With the Behringer CT100 CABLE TESTER you have the advantage of plugging in both ends of a cable and carrying out a wiggle test all along the cable where anyone may have stepped on it. It is not just the plugs you need to test,for which the Behringer CT100 cannot be beaten, its the CABLE as well. The battery runs for ages,it takes any plug and midi ,very useful test tone of 1k lets me slate the recording desk meters and out board at all line levels,and put a test tone on the front of a recording for professional cue level,many desks do not have on board test tone oscillators.You can also test across plug types,jack to XLR, mini jack to large jack,phono to jacks and more.The strong belt clip on the CT100 is very useful when working on PA .What a terrific cable tester,thanks to Behringer.