Monoprice 108128 Professional Coaxial RJ-45 and RJ-11/12 Multifunction Tester with LCD Display<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>The Loopback testing mode can test any RJ type cable (11/12/45) with each end connected directly to the tester</li><li>This can test for Open， Short， Crossed， or Split conditions for each conductor</li><li>It also identifies whether the RJ cable is shielded or unshielded</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41LsA1IGYmL.jpg" noproxy>