rgb liquid crystal shutter projection system projection method : front / rear / ceiling mount lcd : 0.56 inches with mla; driving method : poly-silicon tft active matrix lcd: pixel number 1,024,000 pixels (1280x800) x 3, pixel arrangement stripe native resolution : wxga aspect ratio : 16:10 (which covers 16:9 and 4:3) refresh rate : 50hz-60hz projection lens : digital zoom / manual focus , f-number: 1.8, focal length : 6.48mm , zoom ratio 1.0 - 1.35 (digital) lamp : 170w uhe e-torl lamp life : 4000hr ( low brightness ), 3000hr ( high brightness ) optical system : dichroic mirror separation & prism combine method screen size (projected distance) : 50 to 110 inch (0.54 to 1.22 m) brightness : high/low brightness : 1800/ 1420 ansi lumens(col mode: game) contrast : 500:1 ; brightness uniformity : 85% (typ.) colour reproductivity : full colour (16.77 million colours) video quality : simple interlace - progressive conversion sound output : 10w monaural eff scanning freq range(analog): horiz 15khz -92khz, vertical 50hz -85hz pixel clock : 13.5mhz to 162mhz up to uxga 60hz dimension : exclude feet: 258(d) x 327(w) x 95(h) mm maximum dimension : 272(d) x 327(w) x 157(h) mm weight : approx 3.6kg parallel imported warranty: warranty one year delivery within 2-4 business days