Motorcycle Bicycle Lock Alarm Safety Protection Padlock Disc Aluminum Alloy Anti-Theft Reminder Rope Lock Bag Motorcycle Accesso Features: -Security anti-theft lock universal for motorcycle, scooter, bicycle etc. -It works by locking the disc brake. -Simple and convenient operation. Click the lock cylinder, it will be locked. -Support warning alert function. There will be alarm sounds if the lock is shocked by someone. Usage Instructions: Press the lock core,it will be locked and you will hear the sound "DU", which means it is coming into alarm status,after 5 seconds,When the lock or vehicle is vibrated,the lock will give an alarm"DU DU DU" three sounds,when the lock is vibrated again,after 5 seconds,it will give an alarm and keep alarm with serial vibration.Eeach alarm will last for 10 seconds. It will cost 5 seconds to open the lock for the owner,if the lock can't be opened,it will give an alarm.Use the key to open the lock,the alarm will stop at once.