Intelligent Sensing Technology: Equipped with advanced sensors, this solar-powered taillight enhances your visibility and safety during night rides by automatically adjusting brightness based on ambient light conditions. Ideal for both mountain biking and road cycling. Waterproof and : Crafted from high-quality ABS material, this taillight is designed to withstand adverse weather conditions, making it a reliable companion for your cycling adventures. Its robust construction ensures and consistent performance. Multiple Brightness Settings: Catering to various lighting needs, this taillight features 2 to 4 adjustable brightness levels. Whether you're riding through dimly lit streets or completely dark paths, you can easily select the appropriate intensity for optimal visibility. Easy Installation on Seatpost: This taillight is specifically designed for easy mounting on the seatpost of your bicycle, ensuring a secure fit and hassle-free setup. Its strategic placement enhances visibility to other road users, significantly increasing your safety. Model: CW-D396 Heart-shaped Waterproof: Waterproof for everyday use LED Chip: COB LED Weight: 30g Material: ABS Charging: USB Fast Charging Functions: Light sensor, Solar charging Battery: Built-in high-capacity lithium battery Light Modes: Slow flashing red light - Solid red light Fast flashing red light Color: Black Package Contents: 1*Bicycle taillight 1*Mounting bracket 1*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.