This product with high stability digital control chip, over discharge protection. When you want to light, the design will be in the top of the button press can be connected, when not, then press the button to disconnect. When charging the power cord, plug into the AC110-220V power outlet, the indicator light is red. Charging takes 12 hours. Lighting can be adjusted according to the required angle, is a very practical rechargeable super brightness integrated headlights.