BenQ SP831, 4000 ANSI lumens, DLP, WXGA (1280x768), 2000:1, 508 - 7620 mm (20 - 300"), 1.073 billion colours BenQ SP831. Projector brightness: 4000 ANSI lumens, Projection technology: DLP, Projector native resolution: WXGA (1280x768). Light source type: Lamp, Service life of light source: 3000 h, Service life of light source (economic mode): 4000 h. Focal length range: 22.32 - 26.06 mm, Aperture range (F-F): 2.4 - 2.58, Zoom type: Manual. Analog signal format system: NTSC, PAL, SECAM. Serial interface type: RS-232, USB connector type: Mini-USB B BenQs SP831 stands out from other projectors in that it can handle dual video sources and display them side by side using split-screen and picture-in-picture technology. Its also a very bright, professional product, but if you only ever need to conn...