Technology: TI DLP Resolution: 640*360 Aspect ratio: 16:9 Contrast ratio: 1000:1 Brightness: 12 Ansi Lumens Lamp: LED(RGB) Lifetime: 20,000 hours Focus: Manual Battery: Built in 2200mAh battery Speaker: Built in speaker Projection distance: 0.5M-3M Display size: 10-60 inches Dimension: 126.6*63.5*22 MM Net weight: 109.5G Formats supported: "Picture, Video, Movie,office files such as WORD, EXCEL,PPT,PDF Ports: Mini USB Accessories: USB cable/user manual Other features: DC 5V/1.5A, can be charged with PC/Input terminal Exclusive for IPHONE 4 signal input/build-In speaker, can enhance the volume while playing/ can be backup battery for IPHONE4