... main machine.PTZ controlRS232 can turn to PTZ interfaceGPS Support GPS module expansion, recoding and playback the vehicle route G ... sale service with 2 years warranty, lifetime maintaince5. Support 3G. GPS. G-SENSOR. Modual for option6. Over-load, over-current, ... (blackmail and robbery)3. Facilitate the management of company vehicles (GPS positioning)4. Full view backing-car function5. Sensor & alarm6. ...