20-30km VFL Fibre Optic. Pen Visual Fault Locator 30mw Optical Tester Fibre Checker 30mw. 30mW(20-30km). 1 x Visual Fault Locator 30mw(without Battery). The 650nm Pen-type Visual Fault Finder is specially designed for field personnel, engineers who need an efficient and economical tool for fibre tracing, fibre routing and continuity checking in an optical network during and after installation.
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