Monoprice RJ11/RJ45 tester is a simple, yet powerful, tool that helps troubleshoot network and telephone cables for broken wires and crossed connections.

The tester consists of a main Master unit and a detachable Remote unit, each of which have an RJ11 and an RJ45 jack. The unit is powered with a 9-volt battery (not included) and can be stored in the included, zippered, synthetic leather case.

The Master and Remote unit each have a series of 9 LEDs that show the status of each line on the attached cable. The tester supports both a fast automatic and a slow automatic mode.

IMPORTANT! DO NOT CONNECT TO A CABLE THAT IS PLUGGED IN TO A LIVE CIRCUIT AS THIS MAY CAUSE DAMAGE TO THE TESTER OR OTHER EQUIPMENT ON THE CIRCUIT!

This product requires a 9 volt battery, which is not included!