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Function: This is a universal security anti-theft lock for motorcycles, scooters, bicycles, etc. It works by locking the disc brake, stopping the vehicle movement and keeping the vehicle safe. Easy and convenient to operate. Just click the locking cylinder to lock it. Support warning alert function. Alarm sounds when someone shocks the lock. Made of high-grade metal, durable and rust resistant. It comes with a small spanner and 2 keys so it is very economical. Specifications: Material: Metal Color: Red, Black, Blue, Yellow (Optional) Battery: 6 * LR44 button batteries (built-in) Alarm Decibel: 110dB Lock Size: 89 x 60 x 31mm / 3.5 x 2.36 x 1.22 Package Weight: Approx. 335g / 11.8oz Instructions: When you press the key cylinder and lock it with a "beep" sound. Vibrates in seconds and 3 "beep" sounds with warning sound. If the lock is impacted, please shake again after 5 seconds, and then the alarm will be generated by continuous vibration. It will not shake within 10 seconds after alarm is activated, and will alarm again. Battery Replacement: To replace the battery, first loosen the screw at the bottom of the lock, then remove the cover and replace the battery. Package Included: 1 x Lock 2 x Keys