Description Advanced Radar Technology: Equipped with a 24GHz radar, this taillight detects approaching vehicles, ensuring enhanced safety during your rides. Intelligent Sensing Mechanism: Features smart sensors that adjust brightness and flashing based on ambient light conditions and traffic, providing optimal visibility at all times. High Visibility LED: The bright LED light is visible from a distance, making sure you are seen by motorists from behind, especially in low light conditions. Waterproof : With an IP64 rating, the taillight is protected against water splashes from any direction, making it suitable for all weather conditions. Easy to Install: This accessory is easy to mount on any bicycle, enhancing safety without adding bulk. Number of lamp beads: 40 Battery capacity: 1000mAh Taillight gear: 5 gears Millimeter wave radar: 24GHz millimeter radar Battery life: about 3 to 6 hours Product size: 62x42x24mm Waterproof level: IP64 Color:Black Material:Aluminum PC Package Contents: 1 * Taillight 1 * Seat tube bracket 1 * Saddle bracket 1 * Charging cable 1 * shim 2 * Grommet 1 * Wrench Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.