Ideal for: Suitable for bicycle, car, motorcycle, electric bicycle, self-balancing scooter, door and window. Multi-function alarm: Works mainly as a burglar alarm, also has search functions for one key vehicle and SOS. Super Loud: When triggered, 113db super loud alarm will be an effective deterrent, can effectively scare away bicycle thieves. Waterproof: Water resistance rate up to IP55, can be used outdoors. Adjustable sensitivity: 7 levels of sensitivity are available, which corresponds to 7 tones (remember) "Do" is the highest and default sensitivity level. Product description Main functions Arm and disarm Touch sensitivity adjustment Select the sound of the bell. One-key vehicle. SOS functions Battery low indicates Wide Application:With its strong and durable casing, it is waterproof and dustproof and very suitable for outdoor use. It is widely used on bicycle, e-bike, motorcycle and scooter , the door and the winodow.