REVALS Waterproof Black AntiTheft Siren 110DBA Security Alarm Lock System Alarm Anti Potong Padlock Bicycle Bike Door Window Shackle Lock with 3Keys for Universal Use

Material Zinc Alloy Color Black This alarm lock combines locking with alarming function It is a good tool for you to protect your properties Normal Lock Can be set to two states mechanical lock and alarm The alarm is activated if the lock is moved touched or knocked This Security Pad Lock will initially ring a warning beep with little meddling movements followed by the proper alarm ring with heavy bangingbreaking force Can be used on door window bicycle container motor bike tricycle pull gate garden etc