<b>4 Light Mode Options and Discharge Time of Full-charging</b><br>9.5hr (full brightness) ,16hrs (half brightness), 10hrs (slow flashing), 11hrs (fast flashing)<br><br><b>How to Charge</b><br>1.Atach the micro USB cable to the Bike light’s micro USB input port.<br>2.Insert the other end of the cable into either an AC adapter(not included ) connected to a wall socket or an actve computer USB port.<br>3.The LED indicator of tail light has a red light when charging and the LED indicator will trun to be green when finished charging.<br><br> <b>Package Contents</b><br>2 X Taillight (red light)<br> 2 X USB cables<br>2 X Silicone mounting Straps for Taillight<br> 1 X Instruction Manual<br>