1. Enhanced Safety Features:The MEROCA Smart Bicycle Tail Light is equipped with advanced auto start/stop technology and a sensitive brake detection system that increases your visibility and safety while riding.2. Waterproof and Durable:Certified with an IPX6 rating, this tail light is fully waterproof, making it suitable for all weather conditions. Its robust construction ensures long-lasting performance.3. Convenient USB Charging: Easily rechargeable via USB, this LED taillight offers extended runtime, making it perfect for long rides and commuting.4. Universal Fit:Designed to fit a wide range of bicycles, the installation is quick and easy, allowing you to get back on the road in no time.5. Light display: Press the power button once to turn on the taillight. Press the power button again to switch the light. There are 3 flashing modes, 3 brightness levels for long-on, and 1 breathing light, for a total of 7 light modes.Lamp beads: COB LEDMaximum brightness: 100 lumensFlood angle: 180 degreesBattery: 500mAhLighting mode: constant light/high light/fast flash/flashColour: As Shownsize:11x8x3.5cmMaterial:AL6061style: A Cushion Color / B Seat Tube Black / C Cushion Gold Pink / D Seat Cushion BlackPackage Contents:1 * Bike Light1 * Bracket1 * Data cableOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.