ascher ultra bright usb rechargeable bike light set, powerful bicycle front headlight and back taillight, 4 light modes, easy to install for men women kids road mountain cycling ascher <b>4 light mode options and discharge time of full-charging</b><br> headlight: 6.5hr (full brightness) ,10hrs (half brightness), 6.5hrs (slow flashing), 12hrs (fast flashing)<br>taillight: 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 front light has a red light when charging and the led indicator will turn to be green when finished charging.<br>4.the led indicator of tail light has a red light when charging and the led indicator will not display when finished charging.<br><br> <b>package contents</b><br>1 x headlight (white light) <br>1 x taillight (red light)<br> 2 x usb cable<br> 1 x mount bracket with screw for headlight<br>1 x silicone mounting strap for taillight<br> 1 x instruction manual<br>