Viewsonic 218.4cm IFP8652-2F 16:9 HDMI/DP/USB-C to. 450nits

Size of the display for this product, measured diagonally, usually in inches.

Brightness is the amount of radiating light emitted from the screen. The brightness rating is measured in candellas per square meter, commonly known as 'nits'.

The number of distinct pixels in each dimension that can be displayed. It is usually quoted as width × height, with the units in pixels: for example, "1024 × 768" means the width is 1024 pixels and the height is 768 pixels. The higher the number of pixels, the sharper the image.

Always gives an optimal view, even in direct sunlight.

Type of supported High Definition (e.g. Full HD, 4K Ultra HD).

Backlighting is the illumination of a screen e.g. LCD (liquid crystal display). There are several types of backlighting with LEDs, e.g. full array, edge lit.

The aspect ratio is the ratio of the width of an image to its height. The native aspect ratio is the one which the projector/display is particularly designed for. Images shown in native aspect ratio will utilize the entire resolution of the display and achieve maximum brightness. Images shown in other than native aspect ratio will always have less resolution and less brightness than images shown in native aspect ratio.

The difference in light intensity between the brightest white and the darkest black.

A property of a display system, defined as the ratio of the luminance of the brightest color (white) to that of the darkest color (black) that the system is capable of producing.

The response time is the time difference between the moment that a source (for example a video card) sends a signal and that equipment (for example a monitor) receives or display the signal. (Used abbreviations: R/F = Rise and Fall.)

A screen of a laptop, smartphone, etc., that responds to touch so you can control the interface using your fingers.

Technology of touch sensetive screen e.g. dual-touch.

There are a variety of touchscreen technologies that have different methods of sensing touch, including resistive and capacitive.

Maximum horizontal angle at which a display can be viewed with acceptable visual performance.

Maximum vertical angle at which a display can be viewed with acceptable visual performance.

The area that can be worked on.

A measure of how solid/firm/rigid something is.

Type of operating system on a device e.g. IOS on Apple devices, Android for mobile devices.

The version of the operating system used e.g. 4.1, 4.2 for Android.

Whether or not a processor is built into the device.

The speed that the microprocessor executes each instruction or each vibration of the clock. The CPU requires a fixed number of clock ticks, or cycles, to execute each instruction. The faster the clocks rate, the faster the CPU, or the faster it can execute instructions. Clock Speeds are usually determined in MHz, 1 MHz representing 1 million cycles per second, or in GHz, 1 GHz representing 1 thousand million cycles per second. The higher the CPU speed, the better a computer will perform.

The number of central processing units ('cores') in a processor. Some processors have 1 core, others have 2 (e.g. Intel Core Duo) or more (e.g. the Intel Xeon E7-2850 has 10 cores).

The maximum internal memory which is available in the product.

The type of RAM (random access memory) inside the device e.g. DDR3.

The device contains speaker(s) to produce sound.

The product has built-in subwoofer, which is a loudspeaker component designed to reproduce very low bass frequencies.

This is a measure of the continuous power (RMS power) produced by a subwoofer.

The device has an internal projector, to show images.

An Ethernet LAN (Local Area Network) interface is present, for a wired conection via a cable.

The different speed levels of the Ethernet LAN connection.

Interface ports to connect pieces of equipment. USB (Universal Serial Bus) has become the most popular wired interface to connect peripherals. USB 2.0 supports speeds up to 480 Mbit/s (USB 1: 12 Mbit/s). The interface FireWire is also known as the IEEE 1394 standard. Enhanced IDE (EIDE)is sometimes referred to as Fast ATA, Fast IDE or ATA-2.

High-bandwidth Digital Content Protection (HDCP) is a form of digital copy protection to prevent copying of digital audio and video content as it travels across connections.

Number of USB 2.0 ports (connecting interfaces) in the device. USB 2.0 was released in April 2000 (now called "Hi-Speed"), adding higher maximum signaling rate of 480 Mbit/s (effective throughput up to 35 MB/s or 280 Mbit/s), USB 2.0 ports are usually black.

The type of USB connector/port that this product has.