Optoma HD23 . Projector brightness: 500 ANSI lumens, Aspect ratio: 16:9, Projection technology: DLP. Service life of lamp: 4000 h. Throw ratio: 1.5 - 1.8:1. Analog signal format system: NTSC, PAL, SECAM, Supported video modes: 1080i, 720p. Noise level: 29 dB