Product Description DVR Watch recorder is a smart gift. Tech parameters of the DVR watch: 1. Pixels: 300, 000 2. USB interface: 2.0(HS) 3. Video format: AVI 4. Video resolution: 352*288 5. Memory: 512M~8G 6. Support to record the sound of video 7. Build-in Li-thium battery: 3.7V/260mAH 8. Contiuous working time: 2 hours 9. Charging time: 2~3 hours 10. WindowsME/2000/XP/MacOS9.2.2 or above O/S(the driver is required to be intalled on computers when the O/S is Windows98)