Cooler Master MasterBox E300L + 420W Silver Trim

The efficiency certification level of a power supply unit, indicating the minimum percentage of input power that is converted to usable output at various load levels (e.g., 20%, 50%, 100%). Common ratings include "80 Plus", "80 Plus Bronze", "80 Plus Silver", "80 Plus Gold", "80 Plus Platinum" and "80 Plus Titanium". The value helps consumers compare energy efficiency and potential operating costs of different power supplies.

Indicates whether a computer case is designed to accommodate the ATX form factor, meaning it supports standard ATX motherboard sizes and power supply connections.

Indicates whether the product includes a dedicated audio input port (e.g., 3.5 mm jack, RCA, optical). A value of "Yes" means an audio input is present; "No" means it is absent.

The total count of physical audio connectors available on the product, such as headphone jacks, RCA outputs, or optical ports. The value is an integer indicating how many separate audio input or output points can be used to connect external devices.

Indicates whether the product includes a built‑in reader that can read removable memory cards such as SD, microSD, MMC or similar formats. A value of "Yes" means the device has such a reader; "No" means it does not.

The colour or combination of colours that a product’s outer shell or enclosure 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 case for consumers.

The physical configuration or design of a computer case, such as ATX, Micro‑ATX, Mini‑ITX, Mid Tower, Full Tower, Rackmount, or other standardized form factors. It indicates the dimensions, mounting points and expansion options that determine compatibility with motherboards and components.

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.

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 vertical dimension of a cooling unit measured from its lowest to highest point. The value is expressed in a physical unit such as millimetres, centimetres or inches and applies to any cooler component where height is relevant, including air coolers, liquid radiators and passive heat sinks.

The arrangement and number of fans supported by a computer case or cooling component, including the size (e.g., 120 mm, 140 mm) and placement (front, rear, top, side). It indicates how many fans can be installed in each location and whether any slots are pre‑filled with fans. This information helps users plan airflow and choose compatible fan sizes.

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.

The specific model name or number of a display that is presented in the showroom for customers to view and compare. It identifies the exact product variant, allowing shoppers to recognize features such as size, resolution, panel type, and brand.

Indicates whether the product supports the E‑ATX motherboard form factor, allowing installation of larger motherboards with extended power and I/O connections.

Indicates whether the product includes an E‑SATA interface for external storage devices. A value of "Yes" means the device has a dedicated E‑SATA port, while "No" indicates it does not.

The total count of physical expansion slots available on a device for installing additional modules or peripherals such as PCI‑Express cards, M.2 drives, USB adapters, or other expansion hardware. It indicates how many separate slots can be used simultaneously or swapped between the product and other devices.

Indicates whether the product has any FireWire (IEEE 1394) ports available for connecting compatible devices.

Specifies the physical configuration or design of a product, such as ATX, Micro‑ATX, Mini‑ITX, tower, case with cover, etc. It describes how the device is built and what mounting or expansion options it supports.

The physical configuration or shape of a product, such as clamshell, tower, rack‑mount, or compact form. It indicates how the device is built and what mounting or expansion options it supports.

Indicates the configuration of the front‑panel audio connection on a device, such as whether it supports separate (front‑only) or combined (front and rear) audio routing. The value is a free‑text string that describes how the front audio ports are wired and used.

Indicates whether the product has an HDMI connector on its front panel. The value can be "Yes" or "No", representing the presence or absence of this port.

The linear dimension of a graphics card measured in a standard unit such as millimetres, centimetres or inches. It represents the overall length from one edge to the other and is used to determine whether the GPU will fit within a computer case or enclosure.

Represents how many headphone or earphone connectors are physically present on the product. The value is a simple integer indicating the total count of headphone ports, regardless of type (e.g., 3.5 mm jack, USB‑C, Lightning) or whether they support audio output only or also input.

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.

The total number of internal 2.5‑inch drive bays available in a computer case or enclosure, indicating how many 2.5‑inch storage devices (such as SSDs or HDDs) can be installed simultaneously.

The total count of internal bays that accommodate 3.5‑inch storage devices such as hard drives or optical drives. It indicates how many separate 3.5‑inch units can be installed inside the product at once.

The total number of internal drive bays available in a computer case or enclosure, including the size of each bay (e.g., 2.5" or 3.5"). This attribute helps users understand how many drives can be installed and the physical dimensions of each bay.

Indicates whether the product is compatible with the ITX form factor, a compact motherboard and case standard used in small or mid‑size computer builds.

The color of the LED lighting on a product, indicating whether it has no LEDs, solid RGB, ARGB, or a specific single color such as Red, Blue, White, etc.

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.

A list of the operational states that an LED indicator on a device can display, such as power status, activity, link, or other functional signals. Each entry represents a distinct status that the LED may show when the device is in use.

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 linear dimension of a graphics card that can fit within the product’s enclosure, expressed in a standard length unit such as centimeters or inches. It indicates how large a GPU can be installed without exceeding the case or chassis limits.

The standardized size and layout classification of a motherboard that determines its physical dimensions, mounting points, and expansion capabilities. Common values include ATX, Micro‑ATX, Mini‑ITX, E‑ATX, XL‑ATX, etc. This attribute helps users identify which computer cases or chassis can accommodate the board.

Indicates that the product conforms to the Micro‑ATX motherboard form factor, a compact standard for computer cases and motherboards that supports a specific size, mounting points, and expansion slot layout. This attribute helps users identify compatibility with components such as power supplies, cooling solutions, and peripheral interfaces.

A list of the standard motherboard form factors that a product supports, such as ATX, Micro‑ATX, Mini‑ITX, E‑ATX, or other recognized formats. Each entry represents a distinct board type that can be mounted in the device, allowing users to quickly determine if their chosen motherboard will fit.

Indicates whether the product includes a dedicated button that allows the user to power the device on or off. The value is either "Yes" or "No".

Indicates the primary use case or target audience for which a product is designed or best suited. Typical values include categories such as Gaming, Home, Business, Server, Education, and others that describe the intended environment or user group.

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

The vertical dimension of a product’s packaging measured from its lowest to highest point. It is expressed in a physical unit such as millimetres, centimetres or inches and helps customers assess how tall the package will be when stored or shipped.

The horizontal measurement of a product’s packaging, expressed in a linear unit such as millimetres or inches. It indicates how wide the package is from one side to the other and helps customers assess fit for storage, shipping, or display.

The electrical power consumption or output of the product, expressed in watts (W). It indicates how much energy the device uses during operation or how much power it can deliver to connected equipment.

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

The physical form factor of a power supply unit, indicating its size and mounting configuration (e.g., ATX, SFX, TFX). This attribute helps determine compatibility with computer cases and other hardware components.

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

The material or construction style of a product’s side panel, such as tempered glass, solid metal, or windowed panels. It indicates the visual and protective characteristics that affect appearance, durability, and airflow.

Indicates whether the product includes a side panel window that allows visual access or ventilation to internal components.

Indicates the types of products, users or environments for which the item is intended or compatible. The value can be a single category such as "Gaming" or a specific product type like "Computer case".

A list of the physical dimensions of hard drives that a product can accommodate, expressed in inches or millimeters (e.g., "2.5", "3.5", "M.2"). The values are typically separated by commas and indicate which drive form factors fit within the device’s bays or slots.

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 USB 3.0 interface, allowing faster data transfer speeds compared to earlier USB standards.

Represents how many USB connectors are available on the product. The value is a simple integer indicating the total count of USB ports, regardless of type or version.

Indicates whether the product includes a USB Type‑C port for charging, data transfer or peripheral connectivity.

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.

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.

Indicates whether the product is compatible with the XL‑ATX form factor, a larger motherboard standard used in some desktop computers and server cases.