TLR-7 Sub Ultra-Compact Tactical Weapon Light500 lumens; 140m beam; runs 1. 5 hours Ambidextrous rear switch Durable, anodized machined aluminum Uses one CR123A lithium battery included Designed to enhance visibility and targeting capability in home defense and tactical situations, the lightweight TLR 7 sub weapon light is designed to attach detach quickly and safely with no tools and without putting your hands in front of muzzle and features a ''safe off'' to prevent accidental activation.