Product Description: Innovative Smart Bike Tail Light with Anti-Theft Alarm System Enhance your cycling safety and security with our Smart Bike Tail Light Alarm, a multifunctional device designed to keep your bike visible and protected. Smart Bicycle Taillights with Alarms: This device functions not only as a bicycle taillight but also as an anti-theft alarm system. Equipped with built-in motion sensors and a loud 110dB vibration alarm, it effectively deters thieves, providing peace of mind when your bike is parked outdoors. With 7 levels of adjustable vibration sensitivity, you can tailor its response from a gentle touch to a firm push. Smart Bicycle Brake Light: Featuring a built-in G sensor, this smart brake light automatically illuminates for 2 seconds when you brake, alerting drivers behind you and helping to prevent rear-end collisions and accidents. Four Light Modes: The taillight offers 160 lumens of ultra-bright illumination and a 270-degree wide angle for maximum visibility. Choose from four modesslow flash, breath, flash, always onvia the wireless remote control to suit your visibility needs both day and night. Intelligent Automatic Switch: Enjoy hassle-free operation with intelligent light and motion sensors. In slow flash and breathing modes, the taillight turns off after 30 seconds of inactivity in darkness and reactivates with movement. In bright environments, it conserves power by turning off automatically, with manual options for continuous use during the day. USB C Rechargeable: Powered by a built-in 3.7V 700mAh lithium battery, this taillight employs version 4 power-saving technology, offering up to 65 hours of operation in normal mode and 3-8 months of standby, depending on usage. Recharge easily with the included USB C cable and DC5V adapter. Two Mounting Methods: Install this versatile taillight using the included mounting bracket or tie strap. The bracket is perfect for pipe installations, while the tie strap is ideal for irregular surfaces, ensuring easy and secure installation. Search Function and Waterproof: Easily locate your bike in crowded areas with the search function, which doubles as a bicycle horn with three selectable ringtones. With an IP65 waterproof rating, this taillight is designed to withstand rainy conditions. Upgrade your cycling experience with our Smart Bike Tail Light Alarm, offering enhanced visibility, security, and convenience, making it an essential accessory for every cyclist.