Streamlight Machined aircraft aluminum with black anodized finish. C4 LED technology. Highly visible green laser. Ambidextrous momentary/steady on-off switch. Three position mode selector switch: laser only, LED only, or both. Mounts directly to handguns with with Glock-style rails and to all Mil-Std 1913 picatinny rails. Windage and elevation adjustment screws. Green laser operating temperature at 32-104 degrees Fahrenheit. IPX4 rated for water resistant operation. Length: 3.39 inches. One 3V CR123A battery included.