NEC MultiSync MA491 49" IPS 4K Ultra HD Digital Signage Flat Panel Display

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Predominant colors of the product

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 a device is equipped with an ambient light sensor that detects the intensity of surrounding light to adjust display brightness or other functions.

Indicates the total count of left‑and‑right (L/R) audio output ports available on a product, such as headphone jacks or speaker connectors that provide stereo sound. The value is an integer representing how many separate L/R pairs can be used to connect external audio devices.

The linear measurement of the outer edge or frame surrounding a display, screen, or other product component, expressed in millimetres or inches. It indicates how wide the bezel is from one side to the other and helps customers assess fit, aesthetics, and compatibility with mounting brackets or protective cases.

The linear measurement of the bottom edge of a display or device’s bezel, expressed in millimetres or inches. It indicates how wide the lower frame is from one side to the other and helps customers assess fit, compatibility with mounting brackets, and overall design aesthetics.

The linear measurement of the bezel’s side edge on a display or similar product, expressed in millimetres or inches. It indicates how wide the bezel is from one side to the other and helps customers assess fit, aesthetics, and compatibility with mounting brackets or protective cases.

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 contrast ratio is the proportion between the brightest and darkest luminance a display can produce, expressed as a simple ratio such as 1000:1. It indicates how well a screen can differentiate light from dark areas, affecting image clarity and color depth.

The amount of light emitted per unit area from a display surface, measured in candela per square meter (cd/m²). It indicates how bright the screen will appear under typical viewing conditions and allows users to compare brightness levels across devices.

The type of display panel used in a visual device, such as LED‑backlit LCD, IPS, TN, VA, OLED, or AMOLED. It indicates the underlying technology that determines image quality, color accuracy, viewing angles, response time and power consumption.

The horizontal measurement of a product’s display, expressed in a linear unit such as millimetres or inches. It indicates how wide the screen is from one side to the other and is used for sizing, fitting, and compatibility purposes.

The total count of physical or virtual display output connections available on a device, such as HDMI, DisplayPort, DVI, VGA, or USB‑C ports that support video output.

The total amount of electrical energy a product consumes over a period of 1 000 hours, expressed in kilowatt‑hours (kWh). This metric allows consumers to compare the long‑term energy usage of devices that operate for extended periods and estimate annual consumption based on typical usage patterns.

The total amount of electrical energy a product consumes during 1,000 operating hours, expressed in kilowatt‑hours (kWh). This metric allows comparison of energy efficiency across devices regardless of their typical usage patterns.

The energy efficiency class indicates the relative performance of a product, expressed with letters ranging from A+++ (most efficient) to G (least efficient). It allows consumers to compare expected operating costs and environmental impact across similar items.

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.

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 range of frequencies, expressed in kilohertz (kHz), over which a device can process or display horizontal signals or scan lines. It indicates the minimum and maximum operating frequencies for horizontal scanning operations.

The IP (Ingress Protection) code indicates a product’s resistance to solids and liquids. It follows the standard two‑digit format (e.g., IP20, IP67), where the first digit represents protection against solid particles and the second against liquids. The code may include an ‘X’ to denote unknown protection for that category or multiple codes separated by commas for products offering different levels of protection in various configurations.

The type of LED backlighting used in a display panel, such as Direct‑LED, Edge‑LED, Full‑Array or other LED configurations. It indicates how the light source is arranged behind the screen to provide illumination and uniformity.

The proportion between the width and height of a screen or image, expressed as two numbers separated by a colon (e.g., 16:9). It indicates whether content is designed for widescreen, square, or other aspect ratios and helps users match devices to their media formats.

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 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.

Indicates the preferred or supported orientation of a product, such as landscape, portrait, horizontal/vertical, or other directional settings. This attribute helps users understand how the device can be positioned for optimal use.

The pair of horizontal and vertical dimensions in millimetres that a product supports for VESA mounting (e.g., "100 × 100 mm"). This value indicates the exact hole spacing required by a mounting bracket to secure the device. It is used for monitors, TVs, projectors and other display equipment that can be wall‑mounted or attached to stands.

A list of the positions or mounting options where a product can be installed, such as indoor, outdoor, wall, desk, floor, ceiling, or universal. Each value represents a distinct placement scenario that the device supports.

The primary purpose of a product, indicating its main intended use or target market segment (e.g., "Gaming", "Office", "Travel"). It helps customers quickly identify whether the item matches their needs and can be used for filtering or categorization across different product categories.

The time interval between a stimulus and the corresponding response of a device or system, expressed in units such as milliseconds (ms). It indicates how quickly the product reacts to input or processes data, which is critical for performance-sensitive applications like displays, gaming monitors, and interactive devices.

The range of relative humidity (expressed as a percentage) within which the storage device is designed to operate reliably. Values are given as a minimum–maximum interval such as "10 - 90 %" and indicate the acceptable environmental moisture level for optimal performance.

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 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.

The range of vertical scan frequencies that a display device can support, expressed in hertz (Hz). It indicates the minimum and maximum refresh rates at which the screen updates vertically, affecting visual smoothness and stability.

The horizontal viewing angle is the maximum width, measured in degrees, that a user can see across a display or screen while maintaining acceptable visual quality. It indicates how far left and right one can look without significant loss of clarity or distortion.