Multi-purpose: Can effectively prevent bicycle theft. Vibration triggered alarm suitable for bicycle, motorcycle, electric bicycle, electric scooter and so on. 7-level adjustable sensitivity: 7-level adjustable sensitivity, from soft touch to push or beat, you can easily adjust it according to your needs. Wireless remote control, easy to use, remote control range up to 20m. Adjustable volume and SOS function: Effectively deters thieves with 113dB audible alarm, 96dB adjustable volume, 105dB to 113dB; it can sound SOS signals to help you when the accident happens. Easy and waterproof installation: easy installation, two installation methods: stick with double-sided sticker or tie it with strap . IP55 waterproof, suitable for outdoor. Exquisite design: Item dimensions: 100*95*32mm. 6 kinds of bell sounds can be operated by remote control, easy to find vehicle position. Battery : 3 AAA batteries for the host. 1 x 27A battery for the remote control. Content: