Towallmark Outdoor Waterproof LED Headlamp Plus Rechargeable Batteries/Charger Econoled outdoor waterproof headlamp perfect fit for outdoor sports, such as camping, traveling, hiking and etc. Internal wiring adopts the high efficient booster circuit Working voltage is wide and can utilize the batteries to the largest extent Material: Aluminum alloy casing, avoid high temperature, fall-off protection Luminous flux: Output brightness comes to 1600 lumens (max)