Super Bright 2000 LM Cree XM-L T6 Led Multi-functional Headlamp Flashlight and Bicycle Headlight, 3 Modes 4 Color Filters Headlight Torch with Bicycle Tail Light Multi-functional Headlamp with CREE XM-L T6 bulb,light up to 2000 lumens;3 Modes: High-Low-Strobe Water-resistant IPX5 (cannot be put into water). Extensive lifetime of LED (100,000hrs) Powered by 1* 18650 Battery or 3* AAA Batteries ( Battery Not Included). Adjustable and elastic head-strap headlamp,best for Running, Mountain Riding,Climbing, Camping, Hunting, Backpacking Warning:It's easy to break off or damage if you take off the front lens.Just rotate the ring to zoom in or out.