The pocket camera is a good DVR for entertainment. Pls dont use it in the situation that the law doesn't allow. RESOLUTION: 640*480 1. Build-in memory: 2G, it saves the video file taking about 4 hours. 2. Net weight of the chewing-gun is 20g; Size: 76*22*12mm 3. Resolution: 640*480 4. CMOS 5. USB interface: 2.0 6. Transfer files by USB line, the chewing-gun can work as a U drive daily 7. Continuing Working time in taking video: 3 hours 8. Power comsumption: 120mA/1h 9. Build-in battery, charge by USB line 10. Charge time: 2 hours 11. O/S: Windows XP, Windows Vista 12. Working temperature: 5 celcius~40 celcius