500 lumens; 140 m beam; runs 1.5 hours Ambidextrous rear paddle switches Uses one (1) CR123A lithium battery (included) Safe-off feature prevents accidental activation; saves batteries Rail clamp system securely attaches/detaches quickly and safely with no tools and without putting your hands in front of muzzle Durable, anodized machined aluminum construction User-enabled strobe function 2.58 in (6.55 cm); 2.4 oz (68.1 g) IPX7-rated; waterproof to 1 m for 30 minutes Limited lifetime warranty Assembled in the USA.