The new TLR-7A includes customized ergonomic switches featuring a low or high position to match your shooting style. It features an ambidextrous on/off switch and a rail clamp that is designed to rapidly attach/detach from the side of compact and full frame weapons. Its low-profile design prevents snagging and a “safe off” feature prevents accidental activation, saving batteries. 500 lumens; 140m beam; runs 1.5 hours. Custom optic produces a concentrated beam with optimum peripheral illumination. TLR-7 side switch model cannot be retrofitted to the TLR-7A rear switch models. Uses one CR123A lithium battery (included). 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. 2.58 (6.55 cm); 2.4 oz (68.1g). IPX7 waterproof to 1m for 30 minutes. 2.58 inches (6.55 centimeters). 2.40 ounces (68.04 grams). This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Check local laws before ordering as you certify you are of legal age and satisfy all federal, state, and local legal/regulatory requirements. I’m always here to serve you. Wish you and your family a good day! Free Life-time Customer Service. Do not miss it.