UCO A120 Comfort Fit LED Headlamp Infinitely adjustable brightness up to 120 lumens plus red night vision mode; burns for up to 200 hours Unique hinge design has no hard point that can cause headaches; allows the lamp to focus forward or down towards the ground Soft, adjustable neoprene strap with hook/loop adjustment for a perfect, comfortable fit External battery pack slides along strap to keep weight off of forehead Battery Type (included): 3 AAA; Bulb Type: Super bright XP-E CREE LED; Highly Water Resistant: IPX 4; Weight (with batteries): 3.7 oz. (104 g)