SureFire KE1H (head for Mini Scout Pro) mounted on a Malkoff Devices MDC 1CR123 handheld light body. It has a clicky switch with one light setting, an O-ring, shrouded end to prevent accidental activation, and runs on one (1) CR123 battery (included). 500 Lumen - 7,600 Candela - 175 meter illumination.