Anti-thief Security Alarm: This disc locks Built in sensors inside ， Capable of detecting vibrations and movements. The 110db alarm system scares away potential thieves ， handy for bikers while parking outside or at home. practical use: This disc lock made of aluminum alloy, robust and durable, Waterproof, resistant to high temperatures, suitable for outdoor climatic conditions Easy to Use: Press the lock core to start the lock operation, no key needed, and 5 seconds later there are beeps to indicate the alarm is activated correctly. Use the key to disarm the alarm. Widely used: Suitable for most motorcycles, mopeds, yachts, scooters, sports bikes, racing cars with thickness less than 7mm. Package Contents: 1 x Alarm Disc Lock (Batteries Included), 2 x Keys, 1 x Hex Key, 1 x Waterproof Starter Cable, 1 x Motorcycle Lock Bag Product description Anti-theft design This disc lock with 110dB alarm, This motorcycle lock is equipped with a sensor, the 110db alarm system scares potential