Multi-functional alarm: Wireless Vibration Alarm triggered by vibration, Suitable for bicycles, motorcycles, vehicles, doors, and windows, etc. You can also use it to protect everything you want to protect. Good function: 7 levels adjustable sensitivity from gently touch to push or beat, easy to set it as your need, Wireless control by remote, strong wireless range up to 66ft. And vehicle search function, easy to find your vehicles in the parking lot, 3 kinds of bells for your choice. Deterrence and self-help function: 3 level adjustable volume, 96dB, 105 dB to 113dB. Waterproof wireless alarm once triggered, 113dB Loud will be a good deterrence. Anti Theft Bicycle Alarm can make a loud sound to draw people's attention. A loud voice can effectively scare thieves away, and can also be applied as an SOS emergency alarm. Waterproof Bicycle Alarm: PC material shell, IP55 waterproof level, can be applied outdoors. We also provide two kinds of installation tools, double-sided sticker, and strap, which can be stably and firmly installed on bicycles, motorcycles, automobiles, and other equipment. The package includes: 3 pieces wireless vibration alarms and three wireless remote controls, auxiliary installation kit, and manual, alarms 3.7 x 1.6 x 0.8 inch exquisite and compact design, easy to hide and install. Tips: When leaving the factory, the remote controller and the host are properly matched. Remote controller a can remotely control host a, but not host B and host C. If pairing is required, the manual says how to pair.