1. Whole machine is waterproof design, work once Power on, A/V reocrd at the same time

2. MPEG-4 compression technique, 640*480/30fps
3. Maximum 8GB SD Card
4. Overwrte automatically
5. Software upgrade via SD card
6.2.5 "720x240 high definition TFT
7.Supply DC12V power to CCD/CMOS camera