BenQ MS517 2800 Lumen SVGA DLP Smarteco Projector Eco Blank Mode allows you to blank the projection screen whenever you need to direct your audiences' focus back on them SmartEco Mode cleverly adjusts the lamp power to maximize power saving by delivering the best contrast and brightness performance using only as much light as needed No Source Detected Mode automatically switches to Eco Blank Mode after the projector is turned on for over three minutes without a display source Closed Captioning Supports 3D Blu-ray via HDMI