Tone and Probe Wire Tracer and Circuit Tester: POTS Line Tip and Ring Testing 24VAC - (CTX30)Quickly trace various types of unenergized cable including electrical wire, twisted pair, LAN, multi conductor, telephone, alarm and others. It features insulated probe tip to prevent short circuits, adjustable sensitivity, audible and visual notification, and Tip Ring Continuity testing. Includes RJ11 and Alligator clip connectors. CATEGORY: TONER PROBE KITS Features Quickly trace wires and check phone lines Adjustable sensitivity Audible and visual