Acer Value X1228H. Projector brightness: 4500 ANSI lumens, Projection technology: DLP, Projector native resolution: XGA (1024x768). Light source type: Lamp, Service life of light source: 6000 h, Service life of light source (economic mode): 10000 h. Focal length range: 21.85 - 24.01 mm, Aperture range (F-F): 2.41 - 2.53, Throw ratio: 1.94 - 2.16. Analog signal format system: NTSC, PAL, SECAM, Supported graphics resolutions: 1024 x 768 (XGA), 1920 x 1200 (WUXGA). Projection modes: Ceiling, Front, Rear, Compatible operating systems: MacOS, Windows