BenQ LK835ST. Projector brightness: 4000 ANSI lumens, Projection technology: DLP, Projector native resolution: 4K (4096x2400). Light source type: Laser, Service life of light source: 20000 h, Service life of light source (economic mode): 30000 h. Focus: Motorized, Throw ratio: 0.69~0.83, Offset: 102.5%. Supported graphics resolutions: 640 x 480 (VGA), 3840 x 2160, Supported video modes: 480i, 480p, 576i, 576p, 720p, 1080i, 1080p, 2160p. Serial interface type: RS-232, HDMI version: 1.4a