GREENCYCLE USB Charging 110dB Bike Alarm Wireless Vibration Motion Sensor, Bike Tail Light with Alarm,Bike Tail Light Alarm Rechargeable, IP65Waterproof, Suitable for Bicycles, Mountain Bikes,5PK

【Multifunctional Taillight Alarm】This 4-in-1 intelligent taillight combines an alarm, brake light, anti-theft protection, and electric bell. Equipped with three-dimensional displacement sensors and advanced algorithms, it accurately detects theft attempts, reduces false alarms, and provides enhanced protection for your bike. Stay safe with this all-in-one solution designed for security and convenience. 【Five Light Modes】The bike tail light offers five versatile modes: slow flash, breathing, burst flash, always on, and off. You can easily adjust the mode to suit different environments and riding conditions. The taillight automatically activates when riding in the dark or through tunnels. Additionally, when the taillight is on, it will light up brighter as you brake, providing a clear visual warning to pedestrians and vehicles around you for added safety. 【Automotive-Grade Alarm Sound】The bike smart tail light features an automotive-grade, 6-segment sound design, delivering powerful alerts with three adjustable volume levels, up to a loud 110dB. The default setting is at maximum volume, effectively deterring potential thieves and attracting attention when needed. 【Adjustable Sensitivity】With 7 adjustable sensitivity levels, alarm from a light touch to more intense vibrations (default set to maximum sensitivity), this alarm is versatile enough for various situations. It’s built with high-quality PC material and anti-ultraviolet components, offering an IP54 waterproof and dustproof rating. Designed to withstand high and low temperatures, it remains reliable in all weather conditions, including wind and rain. 【Automotive-Grade Alarm Sound】The bike tail lightfeatures an automotive-grade 6-segment sound, with three adjustable volume levels, reaching up to 110dB. This powerful sound effectively deters thieves, ensuring maximum security. The default setting is the highest volume, providing a loud and attention-grabbing alert when needed.