Alarm Disc Brake for Your Trip. Anti-Theft Motorcycle Disc Lock Alarm-Strive to serve your life wholeheartedly. Anti-theft Design This disc locks with 110dB alarm.This motorcycle lock has a sensor, the 110db alarm system scares off potential thieves! Premium Material This motorcycle lock made of aluminum alloy, robust and durable. Suitable for a variety of outdoor environments. Widely Used This motorcycle lock fits most motorcycles, scooters, racing bikes, electric bikes, scooters. Attention When you hear the sound "Ge, Ge, Ge ....", a constant voice or the alarm sound within 10 seconds and you stop the alarm at the same time, it means that the battery will be worn, you must replace it. Attention 1. Use the keys provided to loosen the four screws, then remove the top cover and replace the battery. 2. Pay attention to "+" and "-". 3.At regular intervals, clean the keyhole and the pin. Package Contents 1 x Alarm Disc Lock(batteries included) 2 x Keys 1 x Hex wrench 1x Waterproof Booster Cable 1 x Motorcycle lock bag