BenQ LK830ST, 4000 ANSI lumens, DLP, UHD 4K (3840x2160), 3000000:1, 16:9, 1.07 billion colors BenQ LK830ST. Projector brightness: 4000 ANSI lumens, Projection technology: DLP, Projector native resolution: UHD 4K (3840x2160). Light source type: Laser, Service life of light source: 20000 h, Service life of light source (economic mode): 30000 h. Zoom type: Fixed, Offset: 114%. Serial interface type: RS-232. Noise level: 30 dB, Noise level (economic mode): 24 dB, International Protection (IP) code: IP6X