Smart Brake Sensing Bicycle Tail Light, Motion Activated Rear LED Warning Light, Waterproof Night Cycling Safety Light for Mountain Road Bikes-260036

This smart sensor bicycle brake tail light fits most bikes including mountain bikes, road bikes and fixed-gear bikes. It supports two mounting options: seat bow and seat post.
Equipped with a high-brightness optical lens for strong light penetration. Built-in gravity, light and vibration dual sensors: it turns on automatically when vibration is detected in darkness, shuts off after 30 seconds of inactivity, and flashes intensely upon braking to alert traffic behind.
It has smart and normal modes with 6 light effects available.
Made of carbon-fiber-textured ABS, it weighs only 35g, compact and lightweight. The quick-release buckle enables easy, secure installation and removal.
With IP splash-proof rating and Type-C fast charging, it features charging indicator lights and can be powered by power banks, computers and adapters. Boasting reliable battery life, it is ideal for night commutes and long rides to keep you safe.