<b>How to Charge</b><br> 1.Attach 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 active computer USB port. <br> 3.The LED indicator will turn to be green when the Bike Light is fully charged. <br><br> <b>4 Light Mode: </b><br> Head Light: 6hr (full brightness),10hrs (half brightness), 12hrs (slow flashing), 10hrs (fast flashing) <br> Tail Light: 6hr (full brightness),10hrs (half brightness), 12hrs (slow flashing), 10hrs (fast flashing) <br><br> <b>Package Contents: </b><br> 1 X Head light (white light) <br> 1 X Tail light (red light) <br> 2 X USB cables<br> 2 X Silicone mounting strap<br>