With continuity tester you can check LAN patch cable (RJ45) and telephone cable (RJ11) for pass, open, short or cross wire. You can quickly test cables using scan mode, or step mode to check connection one contact at a time. The detachable remote unit allows you to test wires already installed. Pop a 9-Volt battery (Not Included) in, and you’re ready to test the connection to any room in your home or office!

Automatically runs all tests and checks for continuity, open, shorted and crossed wire pairs. Visible LED status display.