Featuresr super bright led bike front light with wide and flat lighting range offers wider viewing angle and extra safety at nightr four lighting modes high 3 4hrs run time low about 12hrs run time flashing about 12hrs run time strobe about 12hrs run timer with built in 1200mah lithium battery and smart circuit protection easily charges from your computer or any device with a usb port in 2 3 hoursr with charging indicator the color of the button turns yellow when usb cable is