acer p7280 projector projection system : dlp resolution : native xga (1,024 x 768) maximum uxga (1,600 x 1,200), wsxga+ (1,680 x 1,050) aspect ratio : 4:3 (native), 16:9; contrast ratio : 2300:1 displayable colours : 1.07 billion colors brightness : 4,500 ansi lumens (std), 3,600 ansi lumens (eco) projection lens : f = 2.52 ~ 2.79, f = 22.55mm ~ 27.06mm 1:1.2 manual zoom and manual focus projection screen size (dig): 31" (79cm) ~ 300" (762cm) projection distance : 3.9' (1.2m) ~ 31.4' (9.6m) throw ratio : 63"@2m (1.57 ~ 1.89:1) horizontal scan rate: 27 ~ 92 khz; vertical refresh scan rate : 50 ~ 85 hz lamp type : philips 330 w user replaceable p-vip lamp keystone correction : +/-40 deg (vertical), +/-15 deg(horizontal) projection mode : front, rear, front ceiling, rear ceiling audio : 2 internal speaker with 3w output ; dig zoom : 8x interface : control: 1 x usb (type b), 1 x rs232 (mini din), 1 x wired remote control port (mini jack); input : 2 x analog rgb/ component video (d-sub),1 x composite video (rca), 1 x s-video (mini din) 1 x component (3 rca),1 x hdmi (video, audio, hdcp),1 x dvi (hdcp), 2 x pc audio (stereo mini jack); output : 1 x analog rgb (d-sub), 1 x pc audio (stereo mini jack), 1 x spdif audio (rca) dimension: 404 x 315 x 120 mm ; weight: 5.4kg