User-programmable strobe 300 lumens; 2.5-hour run time; 12,000 candela peak beam intensity Powered by two (2) 3-volt CR123A lithium batteries Rail grip clamp system securely attaches/detaches quickly and safely with no tools and without putting your hands in front of the muzzle Includes keys for GLOCK®-style rails, MIL-STD-1913 (Picatinny) rails, Beretta® 90two, Smith & Wesson® SW99, and Smith & Wesson® TSW 6000 Series machined aircraft aluminum with black anodized finish Ambidextrous momentary/constant on operation. Double tap paddle within 0.4 seconds to activate strobe. Highly accurate sight repeatability when remounting 4.18 oz (118.6 grams) IPX7-rated design; waterproof to 1 meter for 30 minutes Remote switches available as optional accessories (must be used in conjunction with 69130 remote door switch) Assembled in the USA