The FCT100 is a bright visible light source for checking continuity or quickly tracing multimode fibers in networks to insure proper connections, a difficult task in large fiber count systems. This bright visible source allows the user to check the continuity of multimode fibers or fiber bundles. Quick tracing of fibers on patchpanels. It can be used as a continuity checker to determine if jumper cables or a fiber on a reel that already has connectors is in good condition, or if installed fiber has been damaged. This continuity tester is perfect for testing and troubleshooting every multimode fiber network. This tool efficiently transmits light down fiber, providing easy identification at fiber’s far end. With a range of 4 km (2.5 mi.), it is perfect for testing and troubleshooting every multimode fiber network. Because the light is immediately visible, the user has instant result. And it's so inexpensive every installer in the crew can afford one!