Mini bicycle alarm system: 46mm x 46mm mini anti-theft device, does not take up space. PC + anti-UV material, IP54 waterproof and dustproof, high and low temperature resistance, can be used outdoors, no fear of wind and rain Easy to install wireless alarm system: brackets, cable ties and double-sided adhesive tape are three installation methods without wiring, suitable for bicycles, motorcycles, scooters, tricycles, cars and other models Super durable bicycle alarm systems with remote control: the host has a built-in 700mAh lithium battery, USB-C charging + low battery reminder, eliminating the problems of battery changing. The fourth version of energy-saving technology, the battery of the remote control is more durable Super loud multifunctional anti-theft bicycle: 6-segment alarm sound in automotive quality, 110 dB loud volume, effective deterrent of thieves and efficient theft protection. Three types of electric ringtones can be adjusted, remote control, arming with one button, car easy to find Super sensitive bicycle tracker theft protection: three-dimensional shift sensor and special algorithm can accurately identify theft and reduce false alarms. 7-level sensitivity setting, when someone touches the body, moves, presses or knocks, the alarm sounds immediately. The anti-theft bicycle is also suitable for various occasions such as doors and windows