This Jonard Tools OFI-100 Advanced Optical Fiber Identifier with Power Meter y VFL is designed to quickly identify the direction of light being transmitted in the fiber and display the relative core power without damaging the fiber. This fiber identifier is the perfect tool for identifying fiber in network systems without disrupting the network and includes a built-in VFL and power meter for convenience. The identifier efficiently identifies the traffic direction and frequency (270 Hz, 1 kHz, 2 kHz) with an audible warning. The built-in power meter can be used to measure power using 850, 1300, 1310, 1490, 1550, and 1625 nm wavelengths.