The top-selling products are Visual Fault Locators (VFLs) with a 50KM range, indicating a strong demand for tools that can handle longer fiber optic cables. They're compact, portable, and compatible with most connector types. Find options with long-range detection, universal connectivity, and portable designs. Order FS VFL with fast shipping now!The laser-powered VisiFault Visual Fault Locator is a cable continuity tester that locates fibers, verifies cable continuity and polarity. Continuous and flashing modes make for easier identification.