4 Light Mode Switching:This smart taillight has 4 modes to choose from.High lumen bike taillights make your ride more visible, bright and clearly visible day or night Easy to Install: Bike Rear Light fits most bikes, provides a saddle bracket and adjustable silicone strap, can be mounted to the saddle rail or seat post, can be easily removed from the bracket without additional tools, and can also be used as a Lamps, backpack lights, scooter lights, etc Compact and Portable:Our taillights are designed to be compact and portable, with a small size and construction that adds no burden to your riding experience. Enjoy enhanced safety without sacrificing comfort Bike Light:Light has built-in high-brightness LED beads, high- light to illuminate your ride, and an eye-catching floodlight reminder to visibility from a distance,High brightness warning tail light, high brightness lamp beads, easy installation, waterproof for daily use, newly upgraded, long lasting battery life, making your riding more convenient and safe USB Charging:Conveniently rechargeable via USB,ensuring they meet the demands of daily battery life. Say goodbye to the hassle of replacing batteries and enjoy long lasting performance Colour:B:Yellow Material:ABS Package Contents: 1 x bicycle light 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.