Monoprice SOHO RJ-45 and BNC Tone Generator with Terminator Storage (108133) This Multifunction Tester Is Designed To Work With Rj45 And Bnc Coax Cables It Can Test For Continuity, Open Or Short Circuits, Crossed Wires, Or Incorrectly Wired Split Pairs The Manual Shows Proper Test Results For Each Type Of Cable And Gives Examples Of Failure Indications Compact And Easy To Use, This Cable Tester Is Appropriate For Everyone, From The Home Network Diyer To The IT Professional