Ideal for: Suitable for bicycles, cars, motorcycles, electric bicycles, self-balancing scooters, doors and windows. Multi-function alarm: Mainly works as an anti-theft alarm, also has vehicle search functions and one-key SOS. Super loud: Once triggered, a very loud 110dB alarm is an effective deterrent and can effectively deter bicycle thieves. Waterproof: Waterproof level Up to IP55, can be used outdoors. Adjustable sensitivity: There are 7 sensitivity levels available, which corresponds to 7 tones (don't forget). "Do" is the highest and default sensitivity level. Wide Application With its sturdy and durable housing, it is waterproof and dustproof, very suitable for outdoor use. It is widely used for bicycles, electric bicycles, motorcycles and scooters, door and window. There are also installation holes and interface on the back of the alarm, so it is very easy to install the alarm on your bike or motorcycle. Power Source: Host Battery: 3 * AAA alkaline batteries (included) Remote