Motorcycle Disc Lock Disc Brake Lock for Motorcycle Bike Powered by deelife Attention Before payment -Y3B does not have the alarm function -BY6B has the alarm function Features: Security anti-theft lock universal for motorcycle, scooter, bicycle etc. --Built-in shock sensor, can detect shocks and movements, and alarm immediately, up to 120dB. (BY6B only) --Pure copper lock core --One-piece metal design, stronger anti-theft Easy to lock with a simple pre No fear of rainy days -- Waterproof design -- Anti-rust pure copper lock core, Durable Universal Size For Wide Use Notes: Alarm mode:Pre the lock core and hear a "di" sound. The lock core indicates that it has been locked. After 5 seconds, the "di" sound will sound again, indicating that it has entered the alarm state. When the lock or the motorcycle vibrates, the lock will sound an alarm, and each alarm lasts for 10 seconds. When the key is used to open the lock, the alarm will be stopped immediately. Do not start the alarm:pre the lock core, release and pre again after a "di". When you hear the "di""di", it means that you do not start the alarm. There will be no alarm sound when someone touches and shakes the lock.