1. function: take video and audio & voice control & web camera & USB driver 2. size:55*20*16mm 3. video resolution:640*480 and format AVI 4. video rate: ≤20 fps 5. when there is some sound around, it can record automatically. 6. support SD card 4GB/8GB 7. equipped with li-battery, 160mA 8. charging time: 2~3 hours 9. recording time: 1~2 hours 10. No driver installation is needed if the operating system is Windows ME/ 2000/ XP/Vista or above