500 lumens; 140m beam; runs 1.5 hours; Custom optic produces a concentrated beam with optimum peripheral illumination; Ambidextrous on/off switch; TLR-7 side switch model cannot be retrofitted to the TLR-7A rear switch models; Safe off feature prevents accidental activation; saves batteries; Rail grip clamp system securely attaches/detaches quickly and safely with no tools and without putting your hands in front of muzzle; Securely fits a broad range of full-sized and compact guns; Durable, anodized machined aluminum construction; User enabled strobe function; IPX7 waterproof to 1m for 30 minutes