Acer M550, 2900 ANSI lumens, DLP, UHD 4K (3840x2160), 90000:1, 16:9, 4:3, 16:9 Acer M550. Projector brightness: 2900 ANSI lumens, Projection technology: DLP, Projector native resolution: UHD 4K (3840x2160). Light source type: Lamp, Service life of light source: 4000 h, Service life of light source (economic mode): 10000 h. Focus: Manual, Focal length range: 20.91 - 32.62 mm, Aperture range (F-F): 2.5 - 3.26. HDMI connector type: Full-size. Noise level: 26 dB, Noise level (economic mode): 19 dB