rgb liquid crystal shutter projection system brightness (high/low) : 3500 ansi lumens/ 2700 ansi lumens contrast : 500:1 colour : full colour (16.77 million colours) lens : manual: zoom /focus; f-number: 1.75 - 2.42 focus length : 24 - 38.2mm; zoom ratio : 1:1.6 display : 0.8 inches with mla ( d5) poly-silicon tft active matrix, 786,432 pixels (1024 x 768) x 3, xga lamp type : e-torl 210 w uhe optical system : dichroic mirror separation & prism combine method connectivity : serial i/o: d sub 9 pin x 1; usb type b x1(for mouse, k/b, control) sound output : 5w monaural projection method : front / rear / ceiling mount inc : power cord 3m , computer cable 1.8m, d-sub 15pin (male) - mini d-sub 15pin (male), soft carrying case, built in lens cover , audio adapter battery : alkaline aaa x 2 power consumption : 286w(lamp on) dimension (d x w x h) : 257 x 345 x 95mm; weight : 2.9kg * compact type remote control * start up in approximately 10 seconds * "instant off" cool-down period * direct power on and power off