Cpixen Multi-Functional LED Network Cable Tester LAN Tester for RJ11, RJ12 and RJ45 Network Interface Card  (Green, White)

The base unit of the cable tester can be connected via a network cable directly to a hub or switch to test wire connections, or to a network card to test the send receive pairs of wires, it can test if there is any open or miss-wire without the remote kit. 9 Led's to show you exactly which wire is open or miss-wire on both remote and master unit. Old version has 4 Led's. Master and Remote unit are both included. Automatic scan mode, Rapidly Testing. Power switch is not a push buttom will not easily turn on and waste battery." Note : 9volt Battery not included.