Circuit Tester, RJ11 Cable Tester, Cable Detector and Tone Generator, for Locating and Testing Telephone Line

Versatile features: Easily trace and identify network cables, telephone wires and power lines without stripping insulation. COMPLETE KIT: Includes tone generator, RJ11 connector, alligator clips and probe to meet various connectivity needs. Network connection check: Connect the line tester to the desired line; the cable detector can determine the status of the phone line (free, ringing or busy). Battery Installation: Remove the screws and cover on the back, install 9V batteries (6F22), then replace the cover and screws. Wide compatibility: Suitable for testing telephone lines, coaxial cables and metal wires, making it a practical tool for communication line maintenance technicians.