The TLR-7 A Contour Remote for use with most railed Sig Sauer P320 models is designed for one-handed shooting. Ideal for dog handlers. SWAT teams. door breaching. and close quarter operations. Custom optic produces a concentrated beam with optimum peripheral illumination. Pressure-controlled grip switch provides momentary operation. 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.