Blackstone Anti-Theft 130 db Alarm U-Lock Heavy Duty w/Security Chain (Alarm U-Lock w/Chain)

Blackstone Bike lock is an ultra-strong used independently approved 14mm shackle lock with hardened steel construction. As well as being an extremely secure lock, it has a built-in alarm triggered by movement sensors. And This Heavy Duty 10mm six-sided square-linked chain links made of 2t HARDENED MANGANESE STEEL for ultimate strength, making it ideal for outdoor use

• 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 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. Also It comes with key replacement Code card from which we can help you to equip a new key when you lose them all.
• The package includes: 1 Alarm U Lock, 1 CR2 lithium battery, 3 keys, 1 chain, 1 bag.