Dimension 100?55?32 mm Weight of main frame 110g Light White flash diode Output pressure Max 8V Output current Max 400 mA Usage Operation: Before using, take the handle to charge the built-in battery according to the guidance direction. The speed of handle rotating is 130 turns per minute.The product adopt three high-light diode, the light time would change according to the capacity of the built-in battery. Rotating the handle to make it light when the light become weak.