Green A-40A Live Fiber Optic Identifier with Built-in LED Light — OFI Detector for Single-Mode & Multi-Mode Fiber, FTTH Tool

The Green A-40A identifies individual fibers by detecting optical signals, including fixed-load and tone signals at 270Hz, 1KHz and 2KHz. It quickly locates the required fiber for tracing and verification. Designed for field use, the unit is compact and practical, easy to operate, and offers low detection error for reliable results.