When your travels take you to low-light environments, the TLR-7 Low-Profile, Rail-Mounted Tactical Light from Streamlight provides the illumination you need to be effective. Featuring a rail-grip clamp system, this tactical light can be mounted on a broad range of full-size and compact handguns without tools or any need to put your hands in front of a muzzle. The light's ambidextrous switch provides momentary, steady, or strobe activation of the light. The TLR-7 runs continuously for about 1.5 hours on a single 3V CR123A lithium battery (included).