1,Network Cable Tester for UTP STP RJ45,RJ11,RJ12 2,UL,CE,RoHS certificate ... wrong connection, short circuit and open circuit 5, Cable Tester for RJ11, RJ12, RJ45, Cat 5e, Cat 5, 10/100 Base ... testing. 10, Grounding Test 11, Build in power switch for power saving 12, Operate with one 9V battery ( Not Included ) ...