Project bright vibrant presentations effortlessly any time of day. Designed for meeting rooms and classrooms, the S331 boasts sRGB accurate true to life colour reproduction, long lamp life and energy-saving features to provide you with a low overall cost of ownership. This projector is easy to connect to with two HDMI inputs, mhl, USB power and a built-in speaker. Perfect for connecting HDMI dongles such as the Google Chromecast and the Optoma HDcast pro (sold separately). 800 x 600 resolution. Brightness 3200 lumens. 1.07 billion colours. Suitable for screens up to 304in. 2 x 2 watt speaker. Power saving facility. Ceiling mountable. Connectivity: HDMI, pC audio, . General information: Size H9.65, W29.8, D23cm. Weight 2.17kg.