Special feature of Model TT-R: 1. Code-protected remoters, which is impossible to be copied 2. Having wireless immobiliser, which can send out voice signal silently to phone in case of illegal action. The basic features of Model TT-R: 1. Remote Sending alarm to telephone or mobile phone 2. Remote listening in the car and broadcast in the car 3. Remote cutting off engine by phone 4. Locking/unlocking the door by phone 5. Having backup battery 6. Integrated unit with metal box