SainSonic TL532 10mW Visual Fault Locator, 2.5mm Universal Connector, Fiber Optic Cable Tester Meter for CATV Telecommunications Engineering Maintenance Sainsonic Visual Fault Locator is designed for fiber tracing, fiber routing and continuity checking Easy identification of fiber break, bend, you can protect the fiber layer Complete mechanical connecting point detection and optimization Small size, easy to field test. High quality pen type visual fault locator Functions: Finding the breakpoints, poor connections, bending or cracking in fiber optic cables