Fluke Networks 26500090 TS90 Cable Fault Finder with BNC to Alligator Clips 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 2,500 feet (762 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