Blackstone Bike Lock with 130 dB Alarm 14 mm Heavy Duty shackle & 46 Inch Heavy Duty Hexagonal Anti-Theft Lock Chain

Blackstone Bike lock is an ultra-strong used independently approved 14mm shackle lock with hardened steel construction. World's Only 130db Loud Alarm System will automatically activate upon sensing any vibration or shock and is loud enough to scare off thieves.

Loud Alarm System provide Maximum Protection for e-Bikes Electric Bikes Scooters & Motorcycles This 46 Inch Heavy Duty 10mm six-sided square-linked chain links made of 2t HARDENED MANGANESE STEEL for ultimate strength, making it ideal for outdoor use; it also features a nylon sleeve against scratches to bicycle, motorcycle surfaces. The bike U-lock comes with 3 keys.

One of them you can take and use in daily life and the others you can leave at home in case the trouble. The package includes: 1 Alarm U Lock, 1 CR2 lithium battery, 3 keys, 1 chain, 1 bag.