QNAP TS-251D-2G 2 Bay NAS

Indicates whether the product has built‑in support for 3‑dimensional (3D) content or displays. A value of "Yes" means the device can render or display 3D images, videos, or games; a value of "No" means it does not have native 3D capability.

The frequency of the alternating current supplied to a power supply or charger, expressed in hertz (Hz). It indicates the acceptable operating range for the electrical mains that powers the device, ensuring proper functionality and safety.

The range of alternating current voltage that the product accepts from its power source, expressed in volts (V). It indicates the minimum and maximum supply voltages compatible with the device across different regions.

Indicates whether the product supports an Access Control List (ACL) feature, allowing administrators to define rules that permit or deny network traffic based on criteria such as IP address, port number, or protocol.

The illumination source used behind a display panel, such as LED, WLED, CCFL or LCD. It determines the brightness uniformity, power consumption and color performance of the screen.

Indicates whether a device has the capability to create backups of its data or settings, allowing restoration in case of loss, failure, or interruption.

The count of individual electrochemical cells that make up a battery pack. This number indicates how many separate cells are connected in series or parallel to provide the required voltage and capacity for the device.

The chemical composition or classification of a battery, such as lithium‑ion, lithium‑polymer, nickel‑metal hydride, sealed lead acid, alkaline, zinc‑air, etc. It indicates the type of electrochemical reaction that stores and delivers energy in the device.

The electrical potential difference supplied to or measured across a battery’s terminals, expressed in volts (V). It represents the battery’s nominal operating voltage and is used to match power sources, chargers, and devices that require a specific voltage level.

A list of brand names that the product is compatible with. Each entry represents a manufacturer whose products can be used with or alongside the item.

A list of web browsers that the product can run or support, typically including major desktop and mobile browsers such as Chrome, Firefox, Safari, Edge, Internet Explorer, Opera, and others. Each value represents a distinct browser name or version range that has been verified to work with the device.

Indicates whether the product contains a battery that is permanently integrated into its design and cannot be removed or replaced by the user. A value of "Yes" means the device has such an internal battery; "No" means it does not.

Indicates whether the product includes a built‑in FTP server that allows file transfer and management over the network without requiring an external device.

Indicates whether the product includes built‑in speaker(s) that can produce sound without requiring external audio devices. A value of "Yes" means the device has one or more integrated speakers; a value of "No" means it does not.

The visual hue or combination of hues that a cable exhibits, expressed as common colour names such as "Black", "White" or comma‑separated lists like "Black, White". It indicates the appearance of the cable for identification and aesthetic purposes.

The linear distance that a cable covers, expressed with a length unit such as meters, centimeters or inches. It represents the total usable length of the cable for connecting devices.

Indicates whether the product includes a slot for inserting a cable lock, such as a Kensington or similar security device.

Specifies the type of interface or mechanism used to secure a cable in its port, such as Kensington, Noble, IBM, or other standard lock slots. This attribute helps users identify compatibility and security features of the device.

Indicates whether the product includes a built‑in system for organizing, routing, or securing cables. The value can be "Yes" when a cable management feature is present, "No" when it is absent, or a descriptive term such as "Cable Inlay System (CIS)" or "Cable Management System (CMS)" that specifies the type of integrated solution.

The category or technology of a cable, such as Cat5e, HDMI, USB, SATA, fiber optic, or other transmission types. It identifies the primary function and compatibility of the cable with devices and systems.

A list of the cable types that are supplied with the product, such as USB, HDMI, VGA, DisplayPort, LAN (RJ‑45), SATA, audio or other relevant connectors.

Indicates whether a product includes one or more carrying handles that allow it to be held by hand or used as a support for transport.

The number of clock cycles that a memory module takes to complete a read operation after the address has been sent. It indicates how quickly data can be accessed from RAM and affects overall system performance, especially in high‑speed memory configurations.

The form or style of a protective enclosure for electronic devices, such as laptops, tablets, phones, or other gadgets. It indicates whether the case is a hard shell, soft sleeve, backpack, messenger bag, folio, flip cover, or any other design that protects and carries the device.

A list of official certifications or compliance marks that the product has received from regulatory bodies, safety organizations, or industry standards groups. Each entry represents a distinct certification such as CE, FCC, RoHS, UL, or WEEE, and may include additional details like version numbers or specific test reports.

The physical form factor of a computer chassis, indicating its size and layout such as Tower, Desktop, Mini‑PC, or rack units (e.g., 1U, 2U). This attribute helps users identify the footprint, mounting options, and compatibility with other hardware.

The colour or combination of colours that a product is available in, expressed as common names such as "Black", "Silver" or comma‑separated lists like "Black, White". It indicates the visual appearance of the item for consumers.

The diagonal width of a rack that the product can fit into, expressed in inches or centimeters. This measurement indicates the maximum rack width compatible with the device and is used to determine whether the product will physically mount in standard rack enclosures.

Specifies the type of device or system that the product is intended to be used with, such as a PC, server, notebook, surveillance system, or other electronic equipment. The value represents a single category and can be used to filter or group products by their target platform.

The physical interface or port located at the first end of a cable or device, such as USB‑A, HDMI, RJ‑45, DisplayPort, Lightning, or other standard connectors. It identifies the shape, pin count and electrical characteristics that determine compatibility with cables, adapters or other components.

The physical shape or configuration of the first connector on a device, indicating whether it is straight, angled, right‑handed, left‑handed, rotating, foldable, or another form. This attribute helps users identify how the connector aligns with cables and ports.

Indicates the gender or sex classification of a connector, such as Male, Female, or Unspecified. This attribute helps users identify whether a cable or port is designed for insertion (Male) or reception (Female).

The physical interface or port used to connect a device to another component, such as USB, HDMI, RJ‑45, audio jacks, or fiber optic connectors. It identifies the shape, pin count, and electrical characteristics that determine compatibility with cables, adapters, and peripherals.

Indicates whether the second end of a cable or connector is male, female, or another gender type. This value helps users determine compatibility with other components and ensures proper mating of connectors.

The physical position of a connector on a product, such as top left, bottom right, front panel, rear panel or internal mounting point. It indicates where the interface is situated relative to the device’s exterior or interior layout, helping users identify installation points and compatibility with cables or accessories.

The physical interface or port used to connect a device to another component or system, such as USB, HDMI, RJ‑45, 3.5 mm jack, or fiber optic connectors. It indicates the shape, pin count, and electrical characteristics that determine compatibility with cables, adapters, and peripherals.

The method or mechanism used to dissipate heat from a component such as a processor, graphics card, or other electronic part. It indicates whether the device relies on active cooling (fans or liquid pumps), passive heat sinks, or hybrid solutions, and helps users assess thermal performance and noise levels.

The country where the product was manufactured or its primary geographic source. This attribute indicates the nation responsible for the production or assembly of the item.

The linear measurement of an object from front to back or top to bottom, expressed in a physical unit such as millimeters, centimeters, inches, etc. It indicates how deep the item is and can be used for fitting, compatibility, or spatial planning.

A free‑text label that identifies the general category or type of a device, such as "NAS", "Server", "Router", "Storage Enclosure" or any other descriptive class used by manufacturers to classify their products. The value is intended to help users quickly understand the primary function or form factor of the item.

Indicates whether the device supports the DHCP client function, meaning it can automatically request an IP address and related network settings from a DHCP server.

Indicates whether the device supports acting as a DHCP server, allowing it to assign IP addresses and network configuration settings to clients on the network.

The pixel dimensions of a display or image, expressed as width by height (e.g., 1920x1080). It indicates how many pixels are used to render visual content and is commonly used for monitors, TVs, smartphones, cameras, and digital images.

The maximum count of display units that a product can accommodate or operate simultaneously, such as monitors, TVs, or other visual output devices. This value indicates how many separate displays the system is designed to support in its current configuration.

The linear measurement from a product’s mounting surface to the nearest wall or vertical support, expressed in a physical unit such as centimeters or inches. It indicates how far the device can be positioned away from the wall while still maintaining proper clearance and stability.

Maximum theoretical speed at which a device can send or receive data over its Ethernet LAN interface, expressed in megabits per second (Mbps) or gigabits per second (Gbps). It represents the upper bound of throughput under optimal conditions and is useful for comparing network performance between devices with wired connectivity.

Represents the count of independent execution units within a processor or similar component. The value is an integer without any unit of measure, indicating how many discrete execution cores or threads are available for parallel processing.

Indicates whether the product comes with an external power adapter in its packaging. A value of "Yes" means a charger is supplied; a value of "No" means no charger is included and the user must obtain one separately.

The linear measurement across the widest part of a fan, expressed in units such as millimeters (mm), centimeters (cm) or inches (in). It represents the overall width of the fan and is useful for determining fit, compatibility with cases, and airflow characteristics.

The total amount of internal flash memory available in a device, expressed as a data size (e.g., megabytes or gigabytes). This attribute indicates how much data can be stored on the device’s built‑in flash storage and is useful for comparing storage capacity across products.

Indicates whether the product includes a front pocket. The value can be "Yes" or "No", representing the presence or absence of this feature.

Indicates whether a product’s screen has a glossy (shiny) or matte (non‑glossy) finish. A value of "Yes" means the display is glossy, while "No" indicates a non‑glossy surface.

The Harmonized System (HS) code is a standardized numerical identifier used internationally to classify traded goods. It consists of up to six digits, where each pair of digits represents progressively more specific product categories. The HS code facilitates customs duties, trade statistics, and regulatory compliance by providing a common language for describing products across borders.

The pixel dimensions of a product’s screen, expressed as width by height (e.g., 1920x1080). It indicates the total number of pixels that compose the display and is used to assess image sharpness and clarity across devices such as monitors, TVs, laptops, and cameras.

The specific version of the HDMI standard that a product supports, such as "2.0", "2.1" or "1.4b". This value indicates the capabilities and compatibility of the HDMI interfaces on the device.

The vertical dimension of a product measured from its lowest to highest point. It is expressed in a physical unit such as millimetres, centimetres or inches and applies to any item where height is relevant, including books, electronics, furniture and other objects.

Indicates whether the device includes an active backup unit (hot spare) that can automatically replace a failed drive without service interruption.

Indicates whether the product’s drive bays support hot‑swap, meaning drives can be inserted or removed while the device is powered on without shutting down or rebooting.

Indica el material o la combinación de materiales con los que está fabricado el componente más importante de un producto, como metal, plástico, vidrio u otros compuestos. Este atributo ayuda a comprender la durabilidad, peso y estética del artículo.

The range of electrical voltage that a device can safely accept from its power source, expressed in volts (V). It specifies the minimum and maximum supply voltages compatible with the product, covering both AC and DC inputs where applicable.

The total count of separate pockets, sections or dedicated spaces within a product that are built into the item’s structure and designed to hold items such as documents, electronics, accessories or other objects. This value indicates how many distinct areas are available for storing and organizing contents, helping users assess capacity and organization.

Indicates whether the product supports Intel’s Extreme Memory Profile (XMP), a technology that allows users to apply pre‑defined memory timings and frequencies for optimal performance.

The specific version of Intel Smart Response Technology supported by the product, indicating its capability to accelerate disk performance using cache memory. The value is typically a decimal number such as 1.00 or 0.00 that represents the feature level enabled on the device.

The total amount of internal memory available in a device, expressed as a data size such as megabytes (MB) or gigabytes (GB). It indicates how much information the component can hold for active processes and affects multitasking performance.

The type of memory physically installed inside a device, such as DDR4 SDRAM, LPDDR3, or other RAM variants. It indicates the architecture and generation of the internal memory modules that the product uses or supports.

The illumination source used behind a display panel, such as LED, WLED, CCFL or LCD. It determines the brightness, energy efficiency and color accuracy of the screen.

A list of the functions or statuses that an LED indicator on a device can display, such as power status, activity, link, and other operational signals.

Indicates whether the device can combine multiple network connections into a single logical link to increase bandwidth or provide redundancy.

List of Linux operating systems that the product can run or support, including specific versions and architectures when relevant. Each value represents a distinct Linux distribution or kernel version supported by the hardware or software.

Indicates whether a user manual—physical or digital—is provided with the product. A value of "Yes" means that a manual is included, while a value of "No" indicates that no manual is supplied.

The vertical dimension of a product’s outer enclosure measured from its lowest to highest point. It is expressed in a physical unit such as millimetres, centimetres or inches and applies to any item where the overall height of the external case is relevant, including electronics, appliances, furniture and packaged goods.

The linear dimension of a product’s outer case measured in a standard unit such as meters, centimeters or inches. It represents the overall length from one end to the other and is used to compare the size of similar items across categories.

The mass of a product’s external enclosure or shell, expressed in a standard unit such as grams or kilograms. It represents how heavy the outer case is and can be used for shipping calculations, handling instructions, or consumer information.

The horizontal dimension of a product’s outer enclosure measured in a linear unit such as millimetres or inches. It indicates how wide the item is from one side to the other and is used for sizing, fitting, and compatibility purposes.

The material indicates the type of substance from which a product is made, such as metal, plastic, wood, glass, or composite materials. It helps users understand the product’s durability, weight, appearance, and suitability for specific applications.

The maximum count of external or internal display units that a device can drive simultaneously. This value indicates how many monitors, screens, or video outputs the system is capable of supporting at once.

The largest amount of internal random‑access memory (RAM) that a network attached storage (NAS) device can accommodate, expressed as a data size such as megabytes or gigabytes. It indicates the upper limit for active processes and multitasking performance on the NAS.

The largest diagonal measurement of a display that the product can accommodate, expressed in units such as inches or centimeters. It indicates the maximum screen size that will fit within the device’s enclosure or mounting area.

The largest VESA mounting pattern that a product supports, expressed as two horizontal and vertical dimensions in millimetres (for example, "100 × 100 mm"). This value indicates the exact hole spacing required for a compatible wall or desk mount.

The highest mass that a product or component can safely support, expressed in a standard unit such as kilograms or pounds. This value is used to determine load limits for mounting, transportation, and handling.

The maximum operating frequency of a memory module, expressed in hertz (Hz). It indicates how many cycles per second the RAM can perform and is typically reported as MHz or GHz. This value helps users compare performance potential across different memory types and system configurations.

The physical configuration or size classification of a memory module, such as SO‑DIMM, UDIMM, RDIMM, or on‑board. It indicates the form factor that determines compatibility with motherboards and other hardware components.

The number of physical memory slots that are present and available for installing RAM modules in a device. This count indicates how many separate memory sticks can be installed or upgraded.

The smallest diagonal measurement of a display that a mounting product can securely support, expressed in inches or centimeters. This value helps buyers determine whether a particular monitor, TV, or other flat‑panel device will fit the mount.

The method or system by which a product is physically attached or supported, such as wall, desk, ceiling, floor, rack, or free‑standing. It indicates the intended installation location and any required hardware or mounting accessories.

Indicates whether a product supports multiple languages for its user interface, documentation or help resources. A value of "Yes" means the device offers language options beyond the default; "No" indicates it is limited to a single language.

Indicates whether the product includes an on/off switch that allows the user to power it on or off manually.

Indicates whether the product can expand its storage capacity by adding additional drives or modules that are managed through a RAID configuration. A value of "Yes" means the device supports such expansion, while "No" indicates it does not.

Indicates whether the product supports migrating data from an external RAID system to its internal storage without downtime or additional hardware. A value of "Yes" means the device can perform this operation, while "No" indicates the feature is not available.

The range of relative humidity (in percentage) within which the product is designed to operate reliably. Values are expressed as a minimum–maximum interval such as "20 - 80 %" and indicate the acceptable environmental moisture level for optimal performance.

The operating system that is installed on the device, indicating the software platform that manages hardware resources and provides services for applications. It can be a commercial OS such as Windows or macOS, an open‑source distribution like Linux, or a proprietary firmware used in embedded devices.

The specific version of the operating system that a product supports or runs, expressed as a numeric revision (e.g., 10, 11) or a descriptive name (e.g., Nougat). This attribute helps users determine compatibility with software and updates.

The range of temperatures in which a product can safely operate without risk of damage or performance degradation. Values are expressed in degrees Celsius (°C) and may represent a single temperature, a minimum–maximum interval, or an average operating point.

The physical position where the power supply unit is installed or mounted within a device, such as top, bottom, rear, side, front, or built‑in. This attribute helps users understand where to find the power source and plan cable routing or ventilation.

The electrical power rating of a power supply unit (PSU), expressed in watts (W). It indicates the maximum output power that the PSU can deliver to connected components, helping users assess compatibility and energy requirements for their system.

The unique numeric identifier assigned by Intel to each processor model, used for precise identification and lookup of technical specifications.

The highest clock speed a processor can reach when its turbo or boost feature is active, expressed in hertz (Hz). This value indicates the peak performance capability of the CPU under load and helps users compare how fast a processor can run beyond its base clock speed.

The processor family identifies the group or series of CPU models that share a common architecture, design, and performance characteristics. It helps users compare processors across brands and generations by indicating the underlying technology used in the chip.

Identifies the exact model of the central processing unit used in a device, including brand and numeric designation such as "Intel Core i5-8250U" or "AMD Ryzen 7 3700X". This value allows users to distinguish between different processor families, generations, and performance levels.

The set of instruction set architectures or execution modes that a processor can operate in, such as 32‑bit or 64‑bit. This attribute lists the supported modes for the CPU and helps users determine compatibility with software that requires a specific bitness.

The overall dimensions of a processor’s physical package, expressed as length × width × height in millimetres or inches. It indicates the size that must fit within a motherboard socket or mounting area and helps users compare compatibility across different CPU models.

The physical connector used by a processor to attach to a motherboard or compatible platform, such as LGA 1151, BGA 1440, Socket AM4, or LGA 1200. This attribute indicates the exact socket designation required for proper CPU installation and compatibility with other hardware components.

A visual attribute that describes the dominant hue or combination of hues present on a product. It can be a single colour such as "Black" or a comma‑separated set like "Black, Grey" to indicate multiple prominent colours used in the item’s design.

The count of individual product units contained within a single master outer case or packaging unit. This value indicates how many pieces are shipped together in one outer carton, helping buyers assess inventory, shipping costs and storage requirements.

Indicates whether a quick‑installation guide is provided with the product. A value of "Yes" means that a brief, step‑by‑step manual or overview is included to help users set up the device quickly; "No" indicates that no such guide is supplied.

A comma‑separated list that specifies the RAID configurations supported by a storage controller or device. Each entry can be a numeric level (e.g., 0, 1, 5, 10) or a special label such as JBOD. This attribute indicates which disk arrangements the system can manage.

A comma‑separated list of RAID levels that a storage device or controller can support, such as 0, 1, 5, 10, JBOD, and other proprietary configurations. Each value represents a distinct RAID mode the system is capable of creating or managing.

Indicates whether the device has a physical reset button that restores factory settings or original configuration when pressed.

A list of cryptographic and authentication methods that a device can use for secure communication or data protection. Each entry represents a distinct algorithm or protocol, such as encryption ciphers (e.g., AES, WEP), authentication mechanisms (e.g., RADIUS, WPA‑PSK), or network security protocols (e.g., HTTPS, SSL/TLS). The values are typically separated by commas and may include both technical identifiers and consumer‑friendly labels.

A list of network file‑sharing protocols that the device can use to expose shared folders or drives. Common values include CIFS/SMB, AFP, NFS, FTP, and WebDAV. The attribute helps users understand which remote access methods are available for mounting or accessing storage on the device.

The overall dimension or measurement that identifies the size of a product, such as a frame, garment, electronic component, or container. It can be expressed as a single numeric value (e.g., 47 mm), a range (e.g., 50–60 cm), a volume (e.g., 700 ml), or a descriptive label like "One Size". The attribute helps customers compare and select items that fit their needs.

Indicates whether the product supports Intel Smart Response Technology (or equivalent), a feature that uses flash memory as a cache to accelerate disk access and improve overall system performance.

Indicates whether the product has the capability to create point‑in‑time copies of its data or configuration, allowing recovery or backup without interrupting normal operation.

Indicates whether the product includes a built‑in stand or support for an external stand, allowing it to be positioned upright without additional accessories.

A list of the physical sizes and types of storage drives that a product can accommodate, such as 2.5‑inch, 3.5‑inch, or M.2. The values are typically separated by commas and may include additional descriptors like "M.2" to indicate an internal solid‑state drive interface.

The range of temperatures in which a device can safely operate without risk of damage or performance degradation. Values are expressed in degrees Celsius (°C) and may represent a single temperature, a minimum–maximum interval, or an average operating point.

A comma‑separated list of file system formats that the product can read or write, such as FAT32, NTFS, ext4, exFAT, HFS+, and others. Each value represents a distinct storage format supported by the device’s firmware or operating system.

List of physical or logical interfaces that allow an internal storage drive to communicate with the system, such as SATA, M.2 PCIe, U.2, SAS, NVMe, or other standard connections.

A list of the types of storage drives that a product can use, such as HDD or SSD. Each entry indicates a distinct drive type supported by the device, allowing users to understand which internal or external storage media are compatible.

A list of environmental, safety or quality certifications that a product has obtained from recognized authorities. Typical entries include RoHS, ENERGY STAR, CE, WEEE, TCO Certified, FCC, and other industry‑specific standards.

Indicates whether the product includes a system log feature that records events, errors, or status updates for troubleshooting and monitoring purposes. The value is a simple yes/no answer.

Indicates whether the product supports third‑party accessories or components that are not included with the device. A value of "Yes" means such accessories can be used, while "No" indicates they cannot.

The maximum ambient temperature at which the product can safely operate without risk of damage or performance degradation.

Indicates whether a device has a touchscreen interface that can detect touch input. The value is "Yes" if the device includes a functional touchscreen, and "No" otherwise.

The general category or style of the product, such as laptop, printer cartridge, or cooling fan. It helps buyers quickly identify the nature of the item and compare similar products.

Indicates the presence and quantity of USB connectors on a product. The value is typically an integer representing how many USB ports are available, regardless of type or version.

The total amount of space that a product occupies or can hold, expressed as a volume measurement such as liters, milliliters, cubic centimeters, or other standard units. It represents the capacity or physical size in three dimensions and is used for items like containers, appliances, or any object where capacity matters.

Indicates whether the device can be powered on remotely via Wake‑on‑LAN, allowing a network administrator or user to start it from sleep or off state using a network packet.

Indicates whether the product can be configured and monitored through a web interface accessible via a browser, allowing remote administration over a local or internet connection.

The mass of the product expressed in a standard unit such as grams or kilograms. It represents how heavy the item is and can be used for shipping calculations, handling instructions, or consumer information.

Indicates whether the product has built‑in Wi‑Fi capability, allowing it to connect to wireless networks without requiring external adapters or dongles.

A list of Microsoft Windows operating system versions that the product is compatible with, including any relevant architecture or edition information.

Indicates whether the product includes a built‑in wireless LAN (Wi‑Fi) adapter that can connect to Wi‑Fi networks. A value of "Yes" means the device has an integrated WLAN module; "No" means it relies on external adapters or does not support Wi‑Fi.