SecurityIng&reg; Waterproof 3800 Lumens 3X T6 LED Headlamp Super Bright Bicycle Light with Rechargeable Battery Pack and Charger Internal wiring applies the high efficient booster circuit, working voltage is wide. Utilize the batteries in the largest extent. Intelligent circuit control, 3 switch modes. Can be used as Headlamp or bicycle light. Easy to install and use. With special design, equipped with waterproof cover. Support normal use in raining days. Perfect item for outdoor sports, such as camping, traveling, hiking.