Gardner Bender Tester LAN Wire Tracker/Tracer Kit (GET-4220K) Traces any unshielded and unenergized wire or cable Includes RJ-11, Coax, Alligator clip, and RJ-45 transmitter plugs encased in closable hatch Detects unshielded wires up to 12-Inch when using ground clip Adjustable sensitivity detects wires in close proximity LED intensifies as the signal gets stronger