Monoprice Rj-11 and Rj-45 Modular Plug Tester 8138

This 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.