QNAP TS-251A-4G 2-Bay Network Attached Storage System with 2 x 1TB WD Red Drives

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

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.

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

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 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 a built‑in Universal Plug and Play (UPnP) Audio/Video media server that can stream audio or video content to other devices on the network. A value of "Yes" means the device has this capability; "No" means it does not.

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

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

The specific type of cable lock interface that a device provides for securing cables, such as Kensington, Noble, IBM or other standard locking mechanisms.

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 the device includes a built‑in card reader that can read removable memory cards such as SD, microSD, MMC or similar formats.

The physical configuration or shape of a computer chassis, such as tower, rack‑mount (e.g., 1U, 2U), desktop, mini‑PC, or other compact designs. It indicates the overall size and mounting style that determines compatibility with motherboards, power supplies, and case accessories.

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.

List of the memory card types that a device can read or write, such as MicroSD (TransFlash), SD, MMC, CompactFlash, and others. Each value represents a format that the device’s slot or reader supports for storage expansion.

Indicates whether the processor in the device is certified as conflict‑free, meaning it has been tested and confirmed to operate without conflicts or incompatibilities with other system components. A value of "Yes" means the processor meets the conflict‑free standard; "No" indicates it does not.

The method used to dissipate heat from a component or system, such as active cooling (fans or liquid loops), passive heat sinks, or no active cooling. It indicates whether the product relies on airflow, conduction, or other mechanisms to maintain safe operating temperatures.

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 a 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 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.

Indicates whether the product is certified to meet the Digital Living Network Alliance (DLNA) standards, enabling seamless media sharing and interoperability with other DLNA‑compliant devices on a network.

Indicates whether the processor in a device supports Error Correcting Code (ECC) memory, allowing detection and correction of single-bit errors during data storage or transfer.

Indicates whether the product includes embedded options such as firmware features, hardware modules or configuration settings that are built into the device and available for use without external accessories.

Indicates whether the product includes an Ethernet LAN interface for wired network connectivity, allowing data transmission over RJ‑45 or compatible cables.

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 total count of Ethernet LAN (RJ‑45) interfaces available on a product. The value is an integer indicating how many physical Ethernet ports are present, regardless of speed or generation.

Indicates whether the processor’s Execute Disable bit is enabled, allowing the CPU to prevent execution of code from memory regions marked as non-executable.

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.

A list of the HDMI ports available on the product, each entry indicating the number of ports and their specific HDMI version or additional features (e.g., "2 x HDMI 2.0b", "1 x HDMI 1.4 with CEC"). This attribute helps users understand both the quantity and capabilities of the HDMI connections.

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.

A list of the various low‑power or standby modes that a device can enter to conserve energy when not actively performing tasks.

Indicates whether a device includes built‑in 4G WiMAX connectivity, allowing it to access mobile broadband networks without an external modem.

Indicates whether the processor is compatible with the Intel® 64 architecture, enabling it to run operating systems and applications designed for x86‑64 processors.

Indicates whether the product incorporates Intel’s Clear Video HD technology, a hardware feature that enhances video playback and capture quality by providing smoother motion, reduced artifacts, and improved color accuracy.

Indicates whether the processor includes Intel’s Enhanced Halt State feature, which allows the CPU to enter a low‑power idle mode when not actively executing instructions, thereby reducing energy consumption without compromising performance.

Indicates whether the product supports Intel Rapid Storage Technology, a software and firmware solution that enables RAID configurations, improves storage performance, and provides data protection features for compatible drives.

Indicates whether the product supports Intel Secure Boot, a firmware security feature that ensures only trusted software is loaded during system startup.

Indicates whether the product supports Intel Secure Boot, a firmware security feature that verifies the integrity of the operating system and bootloader before allowing them to run. This helps protect against rootkits and unauthorized software.

Indicates whether the product incorporates Intel Smart Connect Technology, a feature that enables automatic network connectivity and device management for seamless integration into enterprise or home environments.

Indicates whether the product incorporates Intel’s Trusted Execution Technology, a security feature that creates isolated execution environments to protect sensitive code and data from tampering or unauthorized access.

Indicates whether the product supports Intel’s virtualization technology, which enables efficient execution of virtual machines by providing hardware‑assisted features such as VT‑x and VT‑d for CPU instruction set extensions.

Indicates whether the product supports Intel Virtualization Technology for Directed I/O, a feature that enables efficient virtualization of input/output operations by allowing virtual machines to directly access hardware devices.

Indicates whether the product’s processor supports the Intel® Advanced Encryption Standard (AES) instruction set, which enables faster and more efficient cryptographic operations.

Indicates whether a product incorporates Intel’s anti‑theft technology, which provides hardware‑based protection against unauthorized access and theft of the device.

Indicates whether the product incorporates Intel’s Clear Video HD technology, a hardware acceleration feature that improves video playback and capture quality by optimizing decoding and rendering pipelines.

Indicates whether the product supports Intel High Definition Audio technology, which provides high‑quality audio input and output through an integrated audio controller.

Indicates whether the processor supports Intel® Hyper‑Threading Technology, allowing each physical core to handle multiple execution threads simultaneously for improved multitasking performance.

Indicates whether the product incorporates Intel® Identity Protection Technology, a security feature that protects user identities and credentials by providing secure authentication and credential management.

Indicates whether the product incorporates Intel® InTru™ 3D technology, a feature that enables efficient generation and rendering of three‑dimensional content with improved performance and visual quality.

Indicates whether the product incorporates Intel® OS Guard, a security feature that protects the operating system from attacks and ensures software integrity.

Indicates whether the product incorporates Intel Quick Sync Video, a hardware‑accelerated video processing feature that enables faster encoding and decoding of common formats such as H.264, H.265, and VP9 while reducing power consumption.

Indicates whether the product includes Intel Secure Key support, a hardware feature that allows secure generation and storage of cryptographic keys within the processor. Presence of this capability enhances protection against physical attacks and simplifies key management for sensitive data.

Indicates whether the product supports Intel® Small Business Advantage, a program that provides small businesses with access to discounted hardware, software, and services tailored for their needs.

Indicates whether the product incorporates Intel Smart Response, a technology that accelerates hard‑disk performance by using a portion of system memory as a cache for frequently accessed data.

The maximum operating frequency that 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.

Indicates whether the product can stream video and audio wirelessly to a compatible display or receiver using technologies such as Miracast, Intel Wi‑Display, or similar protocols. A value of "Yes" means the device has the necessary hardware and software support; "No" means it does not.

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.

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.

The largest amount of internal random‑access memory (RAM) that a processor can address and support, expressed as a data size such as megabytes or gigabytes. It indicates the upper limit of memory capacity for active processes and multitasking performance on devices using this CPU.

The total number of independent memory channels that a processor or motherboard supports for installing RAM modules. Each channel can handle one or more memory sticks, allowing the system to access data in parallel and improving performance.

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.

The sound intensity produced by a product, expressed in decibels (dB) or sones. It indicates how loud the device is during operation and helps users assess suitability for quiet environments.

The total count of individual screws included with a product or component. It indicates how many separate screw units are provided for assembly, mounting, or securing parts, regardless of size or type.

The clock speed at which the integrated graphics processor runs under normal conditions, expressed in hertz (Hz). It indicates how many cycles per second the GPU performs and is useful for comparing visual performance across devices that use an on‑board graphics solution.

The version number of the DirectX graphics API supported by a device, indicating its graphical capabilities and compatibility with software that relies on specific DirectX features.

The model name or number of the integrated graphics adapter built into a device, such as a laptop or motherboard. It identifies the specific GPU variant used for rendering and video processing, allowing users to compare visual performance and compatibility across products.

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

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.

A textual description of how PCI Express lanes are distributed across the available slots or interfaces in a device. The value typically lists groups of lanes separated by commas, where each group may contain a number of lanes and optional ‘+’ signs to indicate combined lanes that share the same speed (e.g., "1x16", "2x8", "1x8+2x4"). This attribute helps users understand the bandwidth capacity and compatibility of expansion slots.

The version of the PCI Express specification supported by a device or component. It indicates the maximum bandwidth and compatibility with PCIe devices such as graphics cards, storage controllers, and expansion cards. The value is typically expressed as a numeric revision (e.g., 2.0, 3.0, 4.0) but may also include descriptive labels for specific generations.

Indicates whether the device supports power‑management features such as automatic sleep, wake‑on‑LAN, or energy‑saving modes. A value of "Yes" means the product can enter low‑power states or be remotely controlled to conserve energy; "No" indicates it lacks these capabilities.

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 Processor ARK ID is a numeric identifier assigned by Intel to each processor model. It uniquely distinguishes one CPU from another and can be used to look up detailed specifications, compatibility information, or firmware updates for that specific chip.

The maximum operating frequency that 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.

The fundamental operating frequency of a processor, expressed in hertz (Hz). It indicates the speed at which the CPU runs under normal conditions and is typically reported in gigahertz (GHz) or megahertz (MHz). This value helps users compare performance potential across different models.

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 indicates the architectural mode(s) supported by 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 processor series identifies the family or generation of a CPU, such as "Intel Xeon E5-2600" or "AMD Ryzen 5000". It is used to group models that share similar architecture, performance characteristics and compatibility features.

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

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.

Indicates whether the product supports RAID (Redundant Array of Independent Disks) functionality. A value of "Yes" means the device can configure and manage multiple disks as a single logical unit for performance or redundancy; "No" indicates no RAID capability.

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.

Indicates whether the product supports S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology), a feature that monitors storage device health and predicts failures.

Una lista de los algoritmos criptográficos y protocolos de seguridad que el producto soporta, como cifrado (AES, WEP), autenticación (WPA2-PSK, EAP-TLS) o protocolos de red (HTTPS, SSH). Cada elemento describe un algoritmo individual; la lista puede contener varios valores separados por comas.

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.

Indicates whether the product allows users to manage access rights for shared folders. A value of "Yes" means that the device or service provides a mechanism to assign, modify, or revoke permissions on shared directories, enabling controlled sharing among multiple users.

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.

The total amount of data that a storage drive can hold, expressed as a numeric value with an appropriate unit such as GB, MB, or TB. This attribute helps users understand how much information the drive can store and compare storage options across devices.

List of physical or logical interfaces that allow communication between a hard drive and other devices, such as SATA, M.2 PCIe, U.2, SAS, NVMe, or other standard connections.

A list of the physical drive sizes that are compatible with the product, such as "2.5"", "3.5"", and "M.2". This attribute helps users determine which external or internal drives can be used with the device.

The total count of individual storage devices (hard disk drives or solid‑state drives) that are physically present in the product. It indicates how many separate drives are installed, regardless of capacity or interface type.

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.

A list of the types of storage drives that a product can accommodate or use, such as HDD, SSD, or hybrid configurations. Each entry indicates a distinct drive type that is supported by the device’s bays, slots, or external interfaces.

The maximum theoretical speed at which the system bus can transfer data, expressed in gigatransfers per second (GT/s). This value indicates the bandwidth capacity of the internal communication pathway between components such as the CPU and memory or peripheral devices.

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.

The maximum amount of power, expressed in watts (W), that a processor or other electronic component is designed to dissipate as heat under typical operating conditions. It represents the thermal load the cooling system must handle and is used by manufacturers and users to assess performance, energy consumption, and suitability for specific environments.

Die maximale Temperatur, bei der ein Produkt sicher betrieben werden kann. Der Wert wird in Grad Celsius angegeben und gibt an, bis zu welcher Hitze das Gerät ohne Gefahr für Funktionsstörungen oder Schäden arbeiten darf.

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 whether the product includes a UART (Universal Asynchronous Receiver/Transmitter) serial communication interface. A value of "Yes" means the device has at least one UART port for transmitting and receiving serial data; "No" indicates no such interface is present.

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.

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

The horizontal measurement of a product, expressed 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.