ALLOSUN Cable Wires Tracker Circuit Telephone Line Tester Short Open Finder Judge continuty of the cables or wires. Track the cables or wires,and diagnose the break point. Receive the tone signal on the cables or wires(telephone line). Idengtify the state in the working telephone line (clear,ring,busy). Send a single solid tone or dual alternating tone to the object cables or wires. Compatible with all common tracing tone sources Judge continuity of the cables or wires Track the cables or wires, and diagnose the break point. Receive the tone signal on the cables or wires (telephone line) Identify the state in the working telephone line (clear, ring, busy) Send a single solid tone or dual alternating tone to the object cables or wires Testing polarity of phone lines Tracing a wire Finding wires buried behind drywall Test whether a cable is interrupted Find interrupts in cable 1 x Cable Tracker Sender 1 x Cable Tracker Receiver 1 x Carrying Pouch English User Manual Standard Factory Packaging