1. FEATURES 2 COLORS LIGHT WITH 6 DIFFERENT MODES: red high(up to 3.5 hrs),red standard(up to 7 hrs),white standard(up to 7 hrs),strobe flashing(up to 11 hrs),SOS flashing(up to 13 hrs) and red and white alternative flashing(up to 14 hrs). 2. USB RECHARGEABLE BICYCLE TAIL LIGHT: save your money and time. 650mAh Lithium battery in the rear bicycle light only takes 2 hours to fully charge by any USB charging device.Charging 5V 1A max. IPX6 water resistant. 3. SUPER BRIGHT TO KEEP YOU SAFE:120 lumen Led COB bicycle tail light with 240 degree visibility angle and high transparent PC cover provides more visibility than any other bike lights. Increase your when cycling in the dark. 4. EASILY MOUNTED/UNMOUNTED,QUICK RELEASE: this bike light has an attached rubber strap that can be used to attach it to a horizontal or vertical part of the bike frame. Fits diameter 0.47' to 1.26'.Also can be a bike helmet light, backpack light.