Aiptek MobileCinema i50S. Projector brightness: 35 ANSI lumens, Projection technology: DLP, Projector native resolution: VGA (640x480). Service life of lamp: 20000 h, Lamp type: LED. Focus: Manual, Offset: 50 %. Power source: DC/Battery, Power consumption (typical): 4.5 W. Battery technology: Lithium Polymer (LiPo), Battery capacity: 1850 mAh, Battery life (max): 2 h