Acer H6815BD. Projector brightness: 4000 ANSI lumens, Projection technology: DLP, Projector native resolution: 2160p (3840×2160). Lamp power: 240 W, Lamps quantity: 1 lamp(s). Focal length range: 15.84 – 17.45 mm, Aperture range (F-F): 2 – 2.05, Throw ratio: 1.5 – 1.65. Analog signal format system: NTSC, PAL, SECAM. Serial interface type: RS-232