Product Name: Full HD 4500lumens short throw 3D dlp projectorFull HD 1080P DLP Overhead Projector, with4500 Lumens(Approximately equal to 32000Lumens led projector lumens) , 240W OSRAM UHP Lamp over 6000hs life span,3D Ready (DLP link Shutter 3D), Constrast Ratio 5000:1, Dynamic contrast 13000:1 ,Built-in Speaker 2.0 Watts,with HDMI 2VGA Mini USB RS232 ports Video Audio ports.Projector Applications:Shortthrowprojectorwidelyusedin:multimediateachingeducation,inter-activewhiteboard,businessmeetings,exhibitions,windowpresentation,publicentertainment,