SecurityIng 500 Lumens LB-XL T6 LED Waterproof Zoomable Rotating Headlamp + Charger(18650 Battery Not Included) Super Bright Bike Headlamp - Maximum brightness comes to 500 lumens. Powered by 2 x 18650 batteries(Not Included). 3 Modes Available - Intelligent circuit control, single button on the back of the lamp cycles through multiple settings(high beam - low beam - strobe mode) Zoomable Function & Adjustable Base - Zoom In & Zoom out by adjust the head light, adjustable base is provided for the headlamp, back and forth inclination fits your different needs. Waterproof Design & Sturdy and durable- Aluminum alloy case, avoiding high temperature, anti fall off. Waterproof and weather resistant. Perfect item for outdoor sports, such as camping, traveling, hiking, cycling, searching. Wide Working Voltage - Internal wiring applies the high efficient booster circuit, working voltage is wide and can utilize the batteries in the largest extent.