Acer Essential X1527i. Projector brightness: 4000 ANSI lumens, Projection technology: DLP, Projector native resolution: WUXGA (1920x1200). Light source type: Lamp, Service life of light source: 5000 h, Service life of light source (economic mode): 12000 h. Focal length range: 15.84 - 17.44 mm, Aperture range (F-F): 1.98 - 2.02, Zoom ratio: 1.1:1. HDMI connector type: Full-size. Compatible operating systems: Windows Mac