Versatile - A 100% brand new and high quality cable tester that allows you to find and trace buried and hidden wires. No need to call or spend more, you can find and repair it yourself. Ideal for installation, debugging, and maintenance of telephone lines and other wires or cables. If the breakpoint is not recognized, please read, download, and use the cable tracer instruction manual. Does not damage the insulation layer - The line finder detects the passage of cables or wires without damaging the insulation. Check that the cable is continuous. Trace cables or wires and diagnose breakpoints. Check cable and network line operation - Receive audio signals through cables or wires (telephone lines). Identify the active telephone line status (idle, ringing, off-hook). Send a single or double color signal to the target wire or cord, it must be grounded during use to play a better role Easy to carry - small, light, easy to carry, long life, low power consumption, compact and safe. It can be reused and is durable. Comes with a bag that is easy to store and prevents dust and collision. Package includes - 1x transmitter, 1x receiver, 1x test leads, 1x carrying case and 1x manual (without battery).