J16 4G GPS Tracker Automatically Engine Cut if it is removed from vehicle. 

J16 gps tracker can work with bluetooth relay. If GPS tracker is removed or dismantled or out of range of bluetooth, the blueooth relay shall automatically cut off engine in 10 minutes. In the video it is 1 mintue to test the function. The interval is fexible by SMS command.
You can find full sms command at
uniguardgps.co...