Securely fits a broad range of weapons using key kit provided; prior to purchase refer to Streamlight's fit guide 500 lumens; 5,000 candela; 140m beam; runs 1 to 1.5 hours depending on battery type Multi-fuel technology that allows either use of Streamlight's properitory rechargeable battery or standard CR123A Rail clamp system securely attaches/detaches quickly and safely with no tools and without putting your hands in front of muzzle IPX7; waterproof to 1m for 30 minutes