Photonix PX-Q555 Flashpistol Aerial Leak Detector and 15dBm 1550nm Laser Source is designed to locate energy leaks in fiberoptic systems due to splice loss, connector loss, breakage, or bending and to identify fibers over long distances. By simply sweeping over a fiber, this Flashpistol IR light detection probe will give an audio and visual indication whenever it encounters a light loss point.