The Saint headlamp produces a wide, variable-output beam optimized for your field of vision. Adjustment from 0 to 100 lumens can be done with one hand by operating a dial integral to the light assembly. Made from hard-anodized aerospace aluminum, the Saint is lightweight, yet built for the rigors of caving and mountaineering. Submersible to 3 feet for up to 30 minutes. Fine-mesh headband features moisture wicking Breathe-O-Prene pads for unmatched comfort and dryness, and a built-in system to keep the power cables secured and out of the way. Virtually indestructible LED emitter can be regulated to maximize output and runtime: from up to 6 hours at 100 lumens to up to 144 hours at 1 lumen. Saint is dual-fuel capable-it can run on one, two, or three 123A lithium batteries, or two AA alkaline batteries. Included is a single-battery adapter cap that holds one 123A battery and screws directly into the Saint's light assembly, enabling you to remove the battery pack/cable system.