Description: Protect Your Motorcycle: Alarm disc lock is equipped with a sensitive alarm device inside, can detect vibration and motion, a slight vibration can activate the alarm, with 130dB alarm sound, can scare away thieves, protect your motorcycle, perfect for those who park their motorcycle outside or at apartment. Sturdy and Waterproof: Motorcycle alarm disc lock is made of high quality zinc alloy material, durable, waterproof, protect the internal structure, help you use it outdoors for a long time. Simple Operation: motorcycle alarm disc brake lock, Just touch to lock, no key required, no other complicated operations, simple and convenient to use. Wide Application: motorcycle alarm brake lock is suitable for most motorcycles and bikes with disc brakes, where the rotor is larger than 7mm(1/4") thick, for most motorcycle, moped, scooter, mountain bike. Package Included: 1x Alarm Disc Lock 2x Keys Specification: Material: Zinc alloy Size: 9cmx6.8cmx3.3cm/3.54inchx2.68inchx1.30inch Applicable aperture: ≥7mm rotor depth: 7mm Package Includes: 1Pcs Alarm Disc Lock 2Pcs Keys Note: Please allow slightly errors due to manual measurement and different monitors.