... surveillance cameras in the world: 1. USB2.0 extension cable is 5,10,20 and 30 meters, Patent USB2.0 extension cable IC. 2. No ... need professional person to install and debug. 3. No need DVR card. 4. No ... infrared. 8. Support Win7, Win XP, compatible with all the main computers.9. USB power supply, 5 meters standard cable, 30 meters ...