1. Insert your car key ,turn ignition key to 'ON' & 'OFF' for 5 times continuously and then stay 'ON'. By now you can heard an alarm sound.
2. Press BIG button 2 times of the new Remote Control and done with alarm sound. Then press BIG button 2 times now for your old Remote Control and done with alarm sound again, to exit the duplication, just turn off the ignition key.