Viewsonic LS901HD. Projector brightness: 6000 ANSI lumens, Projector native resolution: 1080p (1920x1080), Contrast ratio (typical): 3000000:1. Light source type: Lamp, Service life of light source: 20000 h, Service life of light source (economic mode): 30000 h. Focal length range: 17.63 - 27.9 mm, Aperture range (F-F): 2.3 - 3, Offset: 154%. Serial interface type: RS-232. Noise level: 31 dB, Noise level (economic mode): 25 dB
