metal disc brake alarm lock motorcycle scooter security anti-theft wheel lock

usage instruction: 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 sat once.