Saitec &reg; Outdoor Waterproof 1600LM XM-L T6 LED Headlamp LED Front Bike Light Bicycle Head Lamp+ 2 X 18650 Rechargeable Batteries + Charger 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).