USB Mini Projector / It can be used as a second

USB Mini Projector Light Source: LED Resolution: VGA 640 x 480 Aspect Ratio: 4: 3 Brightness: 12 lumens Input: USB connector, it can be connected with computer for presentation, The mini projector and PC can be show the different interface, both of them can be used as the display, 2 displays work at the same time and show different content! Power supply: USB Effective Focal Length: 14.30 mm Focusing: Manual focus in rotation adjustment Projection Distance: 0.2m to infinite Image Size (normal operation): 5 from 0.2m; 73.5 from 3m Contrast Ratio: 50 : 1 Distortion: 1% Uniformity: 85% Color Gamma (comparing to NTSC): >50% LED Power Consumption: 2.5W 700mA driving current LED Life: 20,000 hours Operating Temperature: 0 50 Centi degree Package specifications: User's manual: English USB cable Tripod stand: metal stand