HP M521DW 40 PPM Multi‑Function Printer

The frequency of the alternating current supplied to the device, expressed in hertz (Hz). It indicates the acceptable operating range for the electrical mains that powers the product.

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 a product offers multiple core functions—such as printing, scanning, copying, and faxing—in a single device. A value of "Yes" means the product can perform all these tasks; "No" indicates it is limited to one or fewer functions.

Indicates whether the product includes a built‑in screen or display unit that can be used directly for viewing content, such as an integrated monitor on a laptop or a built-in display on appliances. A value of "Yes" means the device has such a display; a value of "No" means it does not.

Indicates whether the product contains a built‑in central processing unit (CPU) that can execute instructions without requiring an external processor module. A value of "Yes" means the device has such a CPU; "No" means it does not.

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.

The mechanism or method used to operate a product, such as buttons, knobs, touch panels, rotary dials, sensors, or combinations of these. It indicates how the user interacts with the device and what types of controls are available.

The percentage by which a document is scaled when printed, copied or scanned. A value of 100% means the output size matches the original; values below 100% reduce the size and values above 100% enlarge it.

Indicates whether the device can perform copy functions and the type of copying it supports (e.g., colour or monochrome). The value is a free‑text label that describes the copying feature available on the product.

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.

Indicates whether the device can print directly from mobile devices, network shares or other sources without requiring additional drivers or software installation. A value of "Yes" means the printer supports direct printing technologies such as AirPrint, Mopria Print Service, or similar solutions; a value of "No" indicates that direct printing is not supported.

The visual technology used by the product’s screen, such as LCD, LED, OLED, TFT or analog. It indicates the underlying display panel that determines image quality, color reproduction and power consumption.

Indicates whether the device can automatically print on both sides of a sheet in a single pass. A value of "Yes" means duplex printing is supported; a value of "No" indicates that only single‑sided printing is available.

A list of envelope sizes that a product can accept, expressed with standard codes or names (e.g., "DL", "C5", "10"), optionally combined in comma‑separated groups to indicate compatible envelopes.

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

The amount of memory available for storing fax documents, expressed either as a number of pages or as a digital storage size (e.g., megabytes). It indicates how many faxes can be queued or archived before the device requires clearing or additional storage.

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 a printer or related device supports HP ePrint, the feature that allows documents to be sent for printing from mobile devices and computers via an app or web service.

Indicates the target market segment for a product, such as "Business", "Home", or "Small‑medium business". This attribute helps customers quickly identify the intended user group and typical use case of the item.

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.

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.

A list of macOS operating system versions that the product supports or is compatible with, such as "macOS 10.15 Catalina", "macOS 11 Big Sur" or newer releases. Each entry represents a distinct OS version that can run on or be supported by the device.

A classification that indicates the target audience or use case for a product, such as Business, Gaming, Home & Office, Education, etc. It helps customers quickly identify which products are best suited to their needs.

The highest pixel resolution that a printer can produce, expressed as width by height (e.g., 600x1200). It indicates the finest detail achievable in printed documents and images.

The maximum number of pages a printer, copier or fax machine is designed to handle in a typical month of operation. It indicates the expected workload capacity and helps users compare how heavily different models can be used before reaching their limits.

The maximum number of sheets or pages that a printer, copier, or fax machine can accept in a single feeding cycle. It indicates the largest input tray capacity and helps users understand how many pages can be processed automatically before needing to reload paper.

The largest standard ISO A-series paper format that a device can handle, expressed as the ISO code (e.g., "A4", "A3"). This attribute indicates the maximum sheet size supported by printers, scanners, copiers, and similar equipment.

The total count of individual copies that a product can produce, print, or otherwise deliver in a single operation or session. It represents the maximum number of identical units that the device is capable of handling at once, such as the number of pages a printer can copy before needing to pause or reload. The value is an integer and may be accompanied by the word "copies" for clarity.

The highest number of sheets a printer, copier or fax machine can process in a single operation cycle, such as printing, copying or scanning. This figure indicates the device’s throughput capability and helps users compare productivity across models.

The largest paper or media size that a printer can handle, expressed either as standard format names (e.g., "A4", "Legal") or as physical dimensions in millimeters or inches. It indicates the maximum sheet dimensions supported by the device for printing.

The maximum pixel dimensions of a display or image, expressed as width by height (e.g., 1920x1080). It indicates the highest resolution that a device can output or support and is commonly used for monitors, TVs, smartphones, cameras, and digital images.

The largest document dimension that a scanner can capture in a single pass, expressed as width by height in pixels or physical units such as millimeters or inches. This value indicates the maximum size of material that can be processed without trimming.

A comma‑separated list of mobile printing services or protocols that a device can use to send print jobs from smartphones, tablets or other mobile devices. Typical values include Apple AirPrint, Google Cloud Print, Mopria Print Service and similar cloud‑based solutions.

The maximum data transfer rate that a modem can achieve, expressed in kilobits per second (Kbit/s) or other common abbreviations such as Kbps. This value represents the theoretical peak throughput of the device under optimal conditions and allows users to compare the speed capabilities of different modems.

The total count of individual cartridge units included in the product package or supplied with the device. It represents how many separate cartridges—such as ink, toner, filter, or other consumable cartridges—are available for use or replacement.

The pixel dimensions of a scanner’s optical sensor, expressed as width by height (e.g., 1200×2400). It indicates how many pixels can be captured per scan and determines the sharpness and detail of scanned images.

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.

A list of natural languages in which the page descriptions or captions of a product are available. This attribute indicates the linguistic options for textual information that accompanies each page, such as titles, annotations, or metadata.

The type of paper input mechanism available in a printer or copier, such as a standard tray, cassette, sheet‑fed feeder, manual feed, or roll. It indicates how the device accepts and feeds paper for printing, scanning or copying.

A list of the paper or media types that a printer’s input trays can accept, such as envelopes, labels, plain paper, recycled paper, and transparencies. The values are free‑text strings separated by commas, allowing users to see which materials are compatible with the device.

Indicates whether a power cord is supplied with the product. A value of "Yes" means that a power cable is included in the package, while "No" indicates it is not provided and must be purchased separately.

The type of printing process or technology used by the product, such as laser, inkjet, thermal, LED, or other specialized methods.

Indicates whether the printer can produce colour output or is limited to monochrome (black‑and‑white) printing. Typical values are "Colour printing" for devices that support full colour, "Mono printing" for black‑only devices, and "No" when colour capability is not available.

A list of the colours that a product can print or produce, such as black, cyan, magenta, yellow and any additional colour variations (e.g., photo‑black, matte black). The value is a comma‑separated string of colour names. This attribute applies to printers, ink cartridges, toner cartridges, and other printing consumables.

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.

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.

The expected number of pages a printer, copier or fax machine is designed to produce in an average month under normal operating conditions. It indicates the workload capacity that the device can handle without overheating or failure.

A list of communication interfaces or software protocols that a scanner can use to transfer scanned images to a computer or network, such as TWAIN, WIA, SANE, ICA, ISIS, and others. Each entry represents an available option for connecting the device to capture software.

A list of destinations or methods to which a device can send scanned documents, such as email, FTP, cloud services, USB storage, or local PC. Each option represents a supported transfer protocol or target location for the scanned output.

The functional configuration of a scanner, indicating how documents are fed into the device. Common types include flatbed scanners with automatic document feeders (ADF), sheet‑fed scanners, single‑pass or dual‑pass ADFs, and specialized modes such as 1D/2D barcode readers. This attribute helps users understand whether the scanner can handle single pages, multiple pages automatically, or specific scanning formats.

Indicates whether the product can perform scanning operations and what type of scans it supports (e.g., color or monochrome). The value is a free‑text label that may include terms such as "Color scanning", "Mono scanning" or simply "Yes/No" to denote availability.

A list of operating systems that the product can run or support, including specific versions and architectures when relevant. Each value represents a distinct OS that is compatible with the hardware or software.

A list of the physical or logical interfaces that a device can use to connect with other devices, such as USB, Ethernet, Bluetooth, Wi‑Fi, RS‑232, RJ‑45, Parallel, and similar standards.

The maximum amount of material that can be fed into the device in a single operation, expressed as a numeric value followed by an appropriate unit such as sheets, pages or volume.

The total count of input trays or feeders available in a printer, copier, or multifunction device. It indicates how many separate compartments can automatically feed paper into the machine for printing, scanning, or copying tasks.

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 version number of the TWAIN interface supported by a device, indicating its compatibility with scanning software and drivers. The value is expressed as a numeric revision such as 1.9, 2.1 or 2.2.

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 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 the wireless networking protocols and frequency bands that a device can connect to, such as 802.11a, 802.11b, 802.11g, Wi‑Fi 4 (802.11n), Wi‑Fi 5 (802.11ac) or Wi‑Fi 6 (802.11ax). The values are typically separated by commas and may include both the technical name and a consumer‑friendly label.

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.

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