Enhance Night Riding Experience: With 20 LED beads built-in, this smart tail light provides bright and clear illumination for your night cycling. The light is diffused by the nefer optical lens, which makes it gentle and comfortable for your eyes. This way, you can enjoy your night riding with more confidence and safety.Quick and easy charging: With a Type-C charging port, this smart tail light can be fully charged in just 2 hours. It has a 400mAh battery that supports 5 flashing modes with different brightness levels. You can choose the best mode for your riding conditions and enjoy a longer battery life.Smart and Convenient: This tail light has a smart vibration sensor that automatically turns or off depending your motion. It also adjusts its brightness to suit the ambient light and has a brake sensing function that notifies other drivers when you decelerate. Save power and increase your visibility with this smart tail light.Flexible and Convenient: This smart tail light lets you choose between the saddle or the seatpost for mounting. It has two installation modes to suit your needs. It is also and lightweight, making it easy to transport and store. You can install it in seconds without any tools.Solid and Collision-resistant: This smart tail light is made of a strong and wear-resistant aluminum alloy material that can prevent scratch, drop and . It is a solid and reliable product that can last for a long time.