Rpd row overflowhidden padding30px 0 border bottom 1px solid eee rpd row img max width100 rpd left floatleft width50 padding right25 rpd right floatright width50 optoma s311 project bright vibrant widescreen presentations any time on day designed for meeting rooms and classrooms the s311 boasts a long lamp life and energy saving features which provide a low overall cost of ownership this projector has a built in speaker usb power full 3d tec