Description Track the cables or wires, and diagnose the break point. Receiver 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 a dual alternating tone to the object cables or wires.Include a sender (MS6812-T) and a receiver (MS6812-R).. Pls understand that this product contains the items as mentioned in the End Side TITLE Inside brackets.Only these items with mentioned quantity will be deliver Note:-The Total Quantity in the Item is Exactly the Same As Mentioned in the Title in Bracket The Content Displayed in the Photos Videos are Only Meant for the Display Usage Purpose. Perfect for installing, debuging, maintaining telephone line and other wires or cables. Package Contain:- As Choice.