The AFS AF-FCT-100 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. In addition, it can be used as a continuity checker to determine if jumper cables with connections or fiber reels are in good condition or if installed fiber has been damaged. With a range of 4 km (2.5 mi), it is perfect for testing and troubleshooting every multimode fiber network.