Features: 1. IP55 Waterproof: Classic watch appearance, battery and vehicle and bicycle security bodyguard. PC material shell, stronger,IP55 waterproof and dustproof, more suitable for outdoor use 2. 6 Kinds Alarm Sound: 6 kinds of alarm sounds similar to car alarm, 110-115dB high volume; Invisibleparts of the installation can effectively deter thieves. 3. 7 Sensitivity Adjustment: More effective level 7 sensitivity adjustment, from gentle touch, to push beat, suitable for a variety of occasions. Three kinds of electric ring tones, which can be used as remote control bell; Remote control, easy to find the car. Wireless remote control operation, more simple and convenient. 4. Two Install Ways: Double-sided paste or tie belt two kinds of installation, convenient for all kinds of vehicles and battery anti-theft installation. The host is powered by lithium ion battery, super fast charging technology, faster and more convenient. 5. Safety Alarm: Once triggered, the super sound will become an excellent shock. Not only for bikes, bikes, mountain bikes, motorcycles. It can also be used with scooters, doors and Window Specification Type: 1, 2 Material: PC Color: Black Size(L x W x H): About 9.5 x 4.19 x 2.29cm/3.74 x 1.65 x 0.9inch Battery: 500mAh rechargeable battery(built in) Waterproof: IP55 Working temperature: -20 +60? Working humidity: See more?Wide Application?These loud bike alarms can be widely applied in various kinds of vehicles, such as bicycles, motorcycles, electric bikes, electric scooters, mountain bikes, sightseeing vehicles and so on; And they're also practical for home use, you can attach them to a door or window, to remind you when someone opens the door or window. ?Two Install Ways?Double-sided paste or tie belt two kinds of installation, convenient for all kinds of vehicles and battery anti-theft installation. The host is powered by lithium ion battery, super fast charging technology, faster and more convenient. ?Remote Control?Wireless control by remote, vehicle search function, easy to find your vehicles in parking lot. 6 kinds of alarm sounds similar to car alarm, 110-115dB high volume; Invisible parts of the installation can effectively deter thieves. ?Adjustable Sensitivity?These black vibration motion sensors are designed with 7 different levels of sensitivity, you can easily adjust them according to your actual demands, each level can respond to strokes of varying strength, from gently touch to push or beat, and they have a wide range of remote controls. ?Quality Material?This security motorcycle alarm is mainly made of reliable PC, sturdy and solid, will not break or deform easily, can serve you for a long time, the surface and edge are smooth to touch, exquisite workmanship makes it no burr, do not worry it will scratch your bicycles or hands. IP55 waterproof and dustproof, more suitable for outdoor use.