Ultra lightweight and compact. 125 lumens. Ambidextrous momentary/steady On-Off switch; three position mode selector switch. One handed snap-on and tighten interface keeps hands away from muzzle when attaching/detaching. Windage and Elevation adjustment screws mounted in brass bushings for long life and dependable zero retention of laser. Operating temperature: -10°F to +120°F. IPX4 rated design; water resistant operation. Serialized for positive identification. One (1) 3 Volt CR2 lithium battery (included). Length: 2.73 inches. Weight with battery: 2.81 ounces. Includes rail locating keys t fit a wide variety of weapons. Boxed.