Cable Tester: 

1.Test RJ45 and RJ11 network cables.

2.Test correspondingly double-twisted cables 1, 2, 3, 4, 5, 6, 7, 8 and Ground.

3.Can judge wrong connection, short circuit and open circuit.

4.Put cables into both main tester and remote tester. 

5.The lights of the main tester will turn on sequently from 1 to G.

6.Detachable remote tester, test remote cable up to 1000ft. in length.

7.Operate with one 9V battery ( Not Included ).