Viewsonic PA503XB. Projector brightness: 3800 ANSI lumens, Projector native resolution: XGA (1024x768), Contrast ratio (typical): 22000:1. Light source type: Lamp, Service life of light source: 5000 h, Service life of light source (economic mode): 15000 h. Focal length range: 2.56 - 2.68 mm, Aperture range (F-F): 22 - 24.1, Zoom ratio: 1.1:1. Analog signal format system: NTSC, PAL, SECAM, Supported graphics resolutions: 640 x 512, 640 x 640, 640 x 160, 640 x 352, 640 x 360, 640 x 400, 640 x 480 (VGA), 640 x 544, 640..., Supported video modes: 480i, 480p, 576i, 576p, 720p, 1080i, 1080p. Serial interface type: RS-232