bring presentations to life and ensure that meetings are focused and clear. the p1 series has a brightness of 4,000 lumens and, thanks to acer lumisense technology, ensures a clear and sharp image during presentations. acer bluelightshield technology also reduces eye fatigue. model: p1155 projection system: dlp native resolution: 800x600 svga maximum resolution: 1920 x 1200 luminous intensity [lm]: 4000 native aspect ratio: 4: 3 compatible height to width ratio: 16: 9 contrast: 20,000: 1 projection ratio: 1.96 to 2.15 throw ratio: 1.96 ~ 2.15 (1270 mm @ 2000mm) minimum lens opening: f/2.56 maximum lens opening: f/2.68 minimum focus: 22 mm maximum focus: 24.10 mm lamp life in normal mode [hours]: 5000 lamp life in eco mode [hours]: 10,000 lamp life in ectremeeco mode [hours]: 15,000 speakers: yes (3w) interface: 1x vga 1x hdmi 1x hdmi (mhl) 1x usb compatibility: mac pc, windows pc edtv hdtv ntsc pal sdtv secam power supply: 100 v ac ~ 240 v ac 120 v ac 230 v ac consumption [w]: 260 w noise level: 24 dba eco, 32 dba standard weight [kg]: 2,4