SureFire E2L AA Outdoorsman Dual Output LED Flashlight Two output levels low of 5 lumens for extended runtime, high of 120 lumens for maximum light Choice of power source two AA lithium (included) or AA alkaline batteries Virtually indestructible LED emitter regulated to maximize output and runtime TIR lens produces tight beam with enough surround light for peripheral vision High-strength aerospace aluminum body, Mil-Spec hard-anodized for extreme durability