Skycoolwin 3500 Lumens 3x CREE XM-L T6 LED Headlight 3T6 Headlamp Bicycle Bike Light Waterproof Flashlight + 8.4V 4500mAh Battery Pack And AC Charger Cree XM-L T6 LED 3600Lm LED Headlight Headlamp and Bicycle Light. Internal wiring applies the high efficient booster circuit, working voltage is wide and can utilize the batteries in the largest extent. Intelligent circuit control, 4 switch modes to meet your various demands. BEST BIKE LIGHT SET for BIKING / CAMPING / HIKING / RUNNING with Included Helmet Accessories Can be used as Headlamp or bicycle light. Easy to install and use.