The Springfield XML is the smallest tactical light in the world. Powered by a single 3 volt lithium battery (included), this tiny light produces 50 lumens from its high power xenon bulb. Featuring a Picatinny-Style mount, this light is perfect for the Springfield XD series handguns or any other gun with a Picatinny rail. Flip the ambidextrous rocker switch in one direction for momentary activation, or the other direction for constant illumination. Less than 2-1/3" long, with a matte black finish.