Elloapic Universal Alarm Padlock 110db Siren Heavy Duty Security Alarm Lock for Bicycle Motorcycle Door Gate Bike Shed Bolt Chain Lock Elloapic Universal Alarm Padlock 110db Siren Heavy Duty Security Alarm Lock for Bicycle Motorcycle Door Gate Bike Shed Bolt Chain Lock 17mm Shackle Diameter,Anti-cut,Waterproof. Good to have one for your bike or gate. Two setting: one with alarm, the other without. Package include: 1x lock, 3xkeys