The different screen sizes which the device can work with.

The maximum length at which an image can be projected.

La différence d'intensité lumineuse entre le blanc le plus clair et le noir le plus foncé.

Le rapport d'aspect est le rapport entre la largeur d'une image et sa hauteur. Le rapport d'aspect natif est celui pour lequel le projecteur/écran est particulièrement conçu. Les images affichées dans leur format d'origine utiliseront toute la résolution de l'écran et atteindront une luminosité maximale. Les images affichées dans un format autre que le format d'origine auront toujours une résolution et une luminosité moindres que les images affichées dans le format d'origine.

The characteristics of the lamp.

Measure of how strongly the system converges or diverges light. For an optical system in air, it is the distance over which initially collimated rays are brought to a focus. A system with a shorter focal length has greater optical power than one with a long focal length; that is, it bends the rays more strongly, bringing them to a focus in a shorter distance.For an optical system in air, the effective focal length (f and f′) gives the distance from the front and rear principal planes (H and H′) to the corresponding focal points (F and F′).

The amount that the camera lens can zoom.

The supported protocols for exchanging analog signals.

Full High Definition (HD) means that a display supports a resolution of 1920 x 1080 pixel, and has a digital TV connection.

The number of ports (input sockets) for S-Video, which is a signalling standard for standard definition video, typically 480i or 576i.

The two sockets (ports) for receiving left audio signal (white cable) and right audio signal (red cable).

The two sockets (ports) for transmitting left audio signal (white cable) and right audio signal (red cable).

The socket where a microphone is connected to the device.

Number of VGA (D-Sub) ports (connecting interfaces) in the device. The VGA (D-Sub) connector is a 15 pin connector between a computer and a monitor. It was first introduced in 1987 by IBM.

The number of sockets (ports) for HDMI connections. HDMI (High-Definition Multimedia Interface) is a compact audio/video interface for transferring uncompressed video data and compressed/uncompressed digital audio data from a HDMI-compliant device ("the source device") to a compatible computer monitor, video projector, digital television, or digital audio device. HDMI is a digital replacement for existing analog video standards.

The socket in the device for the composite video, which is an analog video transmission (no audio) that carries standard definition video typically at 480i or 576i resolution. The cables for composite video are normally yellow.

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

Number of Ethernet LAN (RJ-45) ports (connecting interfaces) in the device. Ethernet LAN (RJ-45) ports allow a computer to connect to the ethernet.

Popular technology that allows an electronic device to exchange data or connect to the internet wirelessly using radio waves.

The type of wireless local area network (LAN): ad-hoc (where units in a network communicate peer-to-peer) or Infrastructure (units communicate with each other via an access point). A LAN interconnects computers in a small area e.g. home, school or office.

The amplitude level of the undesired background noise, usually measured in decibels (db).

The device contains speaker(s) to produce sound.

RMS (Root mean square) is a measure of the continuous power required by a device, in particular audio amplifiers and loudspeakers.