Mini Bike Alarm System: 46mm x 46mm mini anti-theft device that does not take up space. PC + anti-UV material, IP54 waterproof and dustproof, high and low temperature resistance, can be used outdoors without fear of wind and rain. Easy-to-install wireless alarm system: brackets, cable ties, and double-sided tape are three wiring-free installation methods for bicycles, motorcycles, scooters, tricycles, cars, and more. Ultra- remote control bicycle alarm system: the host has a built-in lithium battery, USB-C charging + low battery reminder, eliminating the trouble of battery replacement. The fourth edition of energy-saving technology, the remote control battery is more . Super loud multi-function anti-theft bicycle: car-grade 6-segment alarm sound, 110 decibels loud volume, effectively deter thieves, and efficient anti-theft. Three kinds of bells are adjustable, remote control, one-button arming, easy to find a car! Ultra-sensitive bike tracker anti-theft: 3D displacement sensors and