Using the three-dimensional displacement sensor, more accurate identification. Support the doorbell remote control and quickly find a car. If you accidentally fall or the tilt angle of the bicycle is more than 45 degrees, an auxiliary tone will be automatically emitted, which provides you and your bicycle with multiple protection. 7 levels of adjustable sensitivity to make your cycling safer. Suitable for installation in different environments. 6 kinds of warning sounds are arbitrarily selected, 113dB loud sound can effectively play the role of anti-theft. Tough, waterproof plastics are permanently attached to your bike or electric car without you having to worry about it in bad weather. Description: This alarm lock adopts waterproof and sos helper function, which allows you to use it without worry. The integrated three-dimensional displacement sensor plays an important role in safety. With excellent function, there are 7 levels of adjustable sensitivity to choose from. A good protection for your beloved bicycle or motorcycle. Specifications: Alarm sound: 6 types Volume: 113 dB Battery: 3 AAA batteries Waterproof: IP55 Control distance to distance: 10-50 meters Package List: 1*Bicycle Security Anti-theft Alarm (battery is not included)1*Remote Controller