Advanced Sensing Technology: Equipped with intelligent sensors, this tail light automatically adjusts its brightness based on ambient light conditions, ensuring optimal visibility at all times. USB Type-C Charging: Features a modern Type-C charging port for quick and convenient charging, ensuring your tail light is for your next ride. Waterproof Design: Rated IPX5, this tail light is designed to withstand adverse weather conditions, making it perfect for all-season cycling. Universal Fit: Easily attaches to any or road bike, enhancing safety with its bright illumination and robust build. Charging method: Type-C Battery capacity: 3.7V 500mAh Waterproof level: IP55 Features: Vibration sensor/digital display/6 lighting modes Type: Seat Post Colour:As Shown Material:PC Package Contents: 1 x Bicycle Light 1 x Mounting Bracket 1 x Type-C Charging Cable Only 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.