1. small volume, hidden in bag, easy to operate it
2. built-in li-battery  with adapter
3. HD SONY CCD camera
4. recording  video and audio  into DVR
5. small DVR (volume  85*54*17 MM )
6. with time watermark  function, gurantee the evidence effectively
7. long operation time, 10 hours for camera, 4 hours for DVR
8. one botton operation, wireless remote on/off,it is easy to operate in.
9. support 16G TF card for recording