KOLSOL RJ11 RJ45 Network Wire Tester Tracker Underground Buried wires and Other Hidden Wires Cable Locator Finder With Earphone -Locating & Tracking Buried and Hidden Wires and Other Hidden-wires -Range Up to 3 Feet Deep and 1000 Feet in Length -Determining Which Receptacles are on Specific Circuits -Pinpointing Drill Sites before Drilling -White LED Flash Light