Fuction: Perfect for installation, debugging, maintenance of telephone line and other wires or cables. It can track cables or wires and diagnose the break point. Receive the tone signal on the cables or wires (telephone line). Sending a single solid tone or dual alternating tone to the object's cables or wires. Compatible with all common tracking tone sources. Identify the status of the telephone line in working order (clear, ringing, busy) Save time and be safe: thanks to the audible signal, you will quickly follow your cable and you will not have to take the risk of not knowing exactly where it is. find your sons. Yellow color. Material: ABS + metal. The RJ11 connector allows you to easily test telephone systems. This wire tracer and circuit tester - including a tone transmitter/generator and detector - is designed to identify and trace wires or cables without damaging insulation. Note: Requires 2 x 9V batteries (not included) Package Included: 1 x Cable Transmitter 1 x Cable Receiver 1 x RJ11 Cable 1 x Cable with Alligator Clip Note: DO NOT connect to a live circuit. The detection probe may be used with live circuits but should NOT be allowed to touch a live wire under any circumstances.