Wire Tracer & Circuit Tester with RJ-11 Plug and Alligator Clips (Tone and Probe Kit) by PTE FINDING WIRES QUICKLY AND ACCURATELY - Identification of telephone tip and ring lines - detection of line condition. Tone Generator: clear, busy, or ringing SAVE TIME AND BE SAFE - Thanks to the tone signal you will track your cable quickly and you don't have to take the risk of not knowing exactly where your wires are located FLEXIBLE USAGE - Thanks to the CONT mode you can check for short and open circuits ADJUSTABLE - Adjustable sensitivity for differentiating wires in close proximity NO RISK - One-year warranty and friendly customer service!