Optoma 3D HD projector uses Eco Plus technology to give you improved lamp life. Check out this BenQ 1080p 3D projector here at Souq.com.The Optoma S331 DLP Projector lets you project bright, vibrant presentations effortlessly any time on the day. The built in speaker system of the device offers you clear sound output and saves you the trouble of connecting external audio peripherals. The projector boasts energy saving feature and log lamp life, which provide a low overall cost of ownership. The projector can be connected to PC, laptop, or a Blu ray player for clearly projected images with sound. It is also perfect for connecting HDMI dongles such as the Optoma HDCast Pro and Google Chromecast. Available in a black finish, Optoma S331 DLP Projector can be easily installed or taken on the move for off site meetings. It is designed for flawless projections in meeting rooms and classrooms.