Acer Business P5827a. Projector brightness: 4000 ANSI lumens, Projection technology: DLP, Projector native resolution: 2160p (3840x2160). Light source type: Lamp, Service life of light source: 5000 h, Service life of light source (economic mode): 10000 h. Focus: Manual, Focal length range: 15.84 - 17.44 mm, Aperture range (F-F): 1.98 - 2.02. HDMI connector type: Full-size, HDMI version: 1.4a. Noise level (economic mode): 26 dB, Projection modes: Ceiling, Front, Rear, Certification: ISF