MS6812 AntiInterference Cable Tester LAN Network Line Finder RJ11 Telephone Wire Find Device Professional Network Detector

Features:
Perfect for installing, debuging, maintaining telephone line and other wires or cables.
Detect continuity of the cables or wires without damaging the insulation.
Track the cables or wires, and find the break point.
Receiver the tone signal on the cables or wires.
Identify the state in the working telephone line.
Send a solid tone or a dual alternating tone to the object cables or wires.