If all cables are working, the lights will turn green from #1 and #2 to #7 and #8 sequentially. If no light is turned on or turned on sequentially, the cables will be broken.
Durable design, works well even on the construction site
Cable Tester for RJ11, RJ45, 10/100 Base-T and…etc
Efficient automatic scanning of lost wires, turbulence cable, open and short circuit
8 LED lights to indicate which wire is open or not on both the remote and main unit
Powered by a recycled DC 9V battery (not included)