Acer Professional and Education X1827 DLP 4K2K 4000 Lm 10.000:1 EMEA 3.1. Projector brightness: 4000 ANSI lumens, Projection technology: DMD, Projector native resolution: UHD 4K (3840x2160). Light source type: Laser, Service life of light source: 5000 h. Focus: Manual, Zoom type: Manual. Serial interface type: RS-232, HDMI connector type: Full-size. Noise level: 26 dB