Designed for sub-compact and compact weapons, the TLR-4 white light illuminator features a green laser to guide your aim. Its housing is constructed of polymer with an aluminum facecap, Barofloat glass lens and ambidextrous on/off switch. It also features a white LED bulb, one handed snap-on and tighten interface and three position mode selector: laser only, LED illumination only, Laser/LED. Included is a CR2 battery.