Bicycle Lock Theft-proof Small Alarm Lock Disc Brakes(Blue)

1. The lock is a dedicated designed 2 in 1 security alarm lock with electronic alarm and mechanical burglary protection system, use keys to turn on / off alarm device. suitable for disc locks on motorcycle, bicycle or scooter, luxury windows and doors as well
2. Rigorous mechanical lock core design
3. Pressed by hand can be locked, two keys, safe and convenient
4. Built-in 6 button batteries
5. Note:
- If the alarm sound is too low or the alarm fails to work normally or the program is not in order, please timely change the batteries
- If the bolt loosed, please tighten it timely to avoid potential risk