Optical Fiber Identifier | OFI-50Description Optical Fiber Identifier Designed to quickly identify the direction of transmitted 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. Features Features Easy to use one key operation Efficiently identifies the traffic direction and frequency tone (270Hz, 1KHz, 2KHz) with an audible warning. The display shows