Introduction of the led bicycle headlamp: Configuration: Aluminum Finish: Harden Anodization LED: SSC P7 LED Lumens: 900 Lumens Modes: High/Low/Strobe, or High/Mid/Low Fuel gauge: The green light will turn to be red when the battery gets low. The battery is full: The battery will be empty: Runtime:about 4.5hours Charging time: about6 hours Waterproof: Yes Note: 1.The led headlamp orheadlightkit includes a light unit, a battery pouch, a charger, a headstrap, a O-rings, a 1-1 extension cable, which packed in a nice gift box. US plug: European plug: UK plug: Australian plug: Headstrap: 1-1 Extension cable: