The bike light/headlamp has a trapezium shape with 4 LEDs which can give extremely strong brightness in the dark. It is equipped with a rechargeable battery pack you can bring the charger while riding for long distance and recharge the battery in the place where serves a charging interface. With 4 levels of strong beam output it enables you to make brighter and wider vision during riding or as a headlamp for you to take adventures in the wild. Support auto-adjust function when the temperature of the bike light reaches 75 it will automatically turn to 75% brightness mode.