Optoma EX615. Projector brightness: 3500 ANSI lumens, Aspect ratio: 4:3, 16:9, Projection technology: DLP. Lamp power: 230 W. Focal length range (f-f): 18.2 - 21.8 mm, Throw ratio: 1.6 - 1.92:1. Vertical scan range: 25 - 85 Hz, Horizontal scan range: 15 - 91 kHz. RMS rated power: 10 W