Audio and video synchronization Color 1/4inch CMOS Camera 300K Pixels Functional clock MPEG-4 Video recording compression 640x480 hi resolution with 30fps 1-16GB internal memory for customer selection With time and date stamp video recording file With USB port suitable for any computer and electronic device Built-in 195mAh rechargeable Li-Battery for 2hrs continousely working Technical parameters Image Sensor: 1/4inch COMS Physical Pixel Array: 0.3million Lens Mount: 2.8mm View Angle: 63 degree Video Recording Compression: MPEG-4 Video Resolution: 640*480 VGA Recording Frame: 30fps Recording capacity based on AVI: <800/hour Battery capacity: 195mAh Charging time of battery: 3hrs Working time of battery: 2hrs Working Voltage: 3.7V Charging Voltage: 4.2-5V Video Consume current: 110mA Operation Temperature: 25-40 Storage Temperature: <50 >-10 Operation Humidity: 70HR Size: 48x45x18mm Inner package weigt: 130*95*65mm G.W.: 250g Outer packege weigt: 500*330*28mm Qty/CTN: 50pcs G.W./CTN: 14kg