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1. Perfect for installing, debugging, maintaining telephone lines and other wires or cables. 2. Detect continuity of the cables or wires without damaging the insulation. 3. Track the cables or wires, and diagnose the breaking point. 4. Receiver the tone signal on the cables or wires (telephone line). 5. Identify the state in the working telephone line (clear, ring, busy). 6. Send a single solid tone or a dual alternating tone to the object cables or wires. 7. Include a sender (MS6812-T) and a receiver (MS6812-R). 8. A professional & safe tool for wireman.
