Super Bright Zoomable 2500 Lumens T6 Beam Led Headlamp Flashlight Bike Bicycle Headlight, 3 Modes Strobe 4 Color Filters Headlight Torch for Hiking Camping Climbing Cycling Fishing Powered by 1* 18650 Battery or 3* AAA batteries (Batteries are NOT Included) Water-resistant IPX5 (cannot be put into water). Extensive lifetime of LED (100,000hrs) 3 Mode of Light: High-Low-Strobe, to meet your need in different circumstance. Adjustable headlamp and elastic head-strap, make it can be adjusted to a comfortable position BEST HEADLAMP for Running, Mountain climbing, Camping, Hunting, Hiking, Night walking, Backpacking