Try this:
Setting up your password | Alarm system
Press and hold + A & - G for a few seconds until 0000 appears.
0000 is the factory default code. Use + A & - G to move to your first desired number and press ON | MODE to save. Repeat 4 times to set your personal alarm code.
Activate your alarm system
Press and hold + A & - G for a few seconds until the blinking lock is displayed. Your system is now armed.
If the bicycle is being moved for more than 1/4 wheel rotation, the battery will emit a sound and the sytem will switch to the maximum generative mode (level 4) to make it very hard to ride off on your bike.
How to disarm the alarm system
Press on any button, 4 zeros will appear, the first one is blinking. Enter your pass-code and press ON | MODE