Multi-Function: 100% brand new and high quality wire tester which can help you find and trace buried and hidden wires. Perfect Cable Tracker for installing, debugging, maintaining telephone line and other wires or cables. Easy Operation: send single audio signal or dual audio signal to cables or child of the object. It must be grounded during use to play a better role. The line finder can trace the cables or wires and diagnose the broken point. Identify the state of the working telephone line (idle, ringing, off-hook). Thanks to the sound signal, you can quickly locate your cable. Will not damage the insulation layer: The cable tracker detects the passage of cables or wires without damaging the insulation. Check if the cable is continuous. Trace cables or wires and diagnose breakpoints. If no breakpoint is detected, please read, download and use the Cable Locator User Guide. Easy to carry: The cable tracker can be reused and durable . Comes with a bag, which can be stored well, avoiding dust and collision. Cable tracker small, light, easy to carry. Note: Requires 2 x 9V batteries (not included). Package includes: 1*transmitter, 1*receiver, 1*test leads, 1*carrying case and 1*manual (without battery ). Note: The cable finder cannot test underground cables and the test can only be performed when it touches the cable sheath.