FLUKE NETWORKS' 26500390 TS100 Kit. Fault finder with tone generator locates open and short circuits, measures cable length, helps isolate individual wire pairs, and detects AC voltage on the line Works on any two or more conductor cable up to 3,000 feet (915 meters) VOP (Velocity of Propagation) can be set to match a cable's specifications to optimize the accuracy of fault location and cable length measurement Patented SmartTone analog tone generator with five distinct cadences for isolating individual wire pairs Four-digit LED display for viewing readings