Super Brightness Powerful 120 Lumen with cluster mounted array of LED work in for an extra wide and powerful tail light output, maximizing your visual presence with 180 degree Visibility. rear bike light has" memory function". It would start with the mode which you used last time. Water rated to IPX6 Protect against splashing water from any angle, it withstand easily enough without causing any issues and endure a variety of weathers. USB Rechargeable Taillight 600mah battery fully charge only needs 2 hours. more convenient and environment friendly. Say goodbye to expensive batteries. Day or night riding, this all-powerful red bike lamp keep you seen! Easy to Install Use the rubber band to fix the tail bike light in anywhere you want to install. Such as handlebar, the back of a helmet, the seat post and anyother place you can install. color: Black&Red Material: Silicone+ Plastic Design Bicycle Light No wires or external batteries Only 35 grams total with internal battery The bike tail light is Water , weather tight design ensures all condition use Can be used as a bicycle helmet light, mountain bike rear light, road bike lights, kid's bike safety light and More! USB Rechargeable 600mah battery, 2 hour charging time Automatic, fully cut-off system Charge from your computer or any device with a USB port Simple Control Button Conveniently located on top of the light for easy access 6 Lighting Modes Full Brightness Red (120 lumen, runtime up to 3 hours 30 mins) Half Brightness Red(50 lumen, runtime up to 7 hours) Full Brightness Blue(120 lumen, runtime up to 3 hours 30 mins) Multicolor Beam (50 lumen, runtime up to 7 hours) Read Flashing (runtime up to 11 hours) Multicolor Flashing (runtime up to 14 hours) Package 1 * Tail bike light 1 * Rubber band 1 * USB cable Only the above package content, other products are not included. Note: Light 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.