Bright Performance: 1,000 lumens, 20,000 candela, maximum throw of 283 meters, and a run time of 1.5 hours on high Quick-Switch Compatibility: Easily transition between handguns and long guns in seconds, making this light a versatile choice for multiple firearms. Designed to mount directly on Glock-style rails and Picatinny rails, it delivers secure, hassle-free installation for reliable performance Easy to Install with Safety in Mind: Rail clamp system securely attaches/detaches quickly and safely with no tools and without putting your hands in front of the muzzle Designed for Both Left-handed and Right-handed Users: Ambidextrous momentary/steady on/off switch which allows for effortless lighting for any situation Built Streamlight Tough: IPX7 waterproof to 1 meter for 30 minutes; durable machined aluminum construction