The cable tester will quickly test 6 types of cables XLR 1/4 1/8 Speakon stereo RCA and DIN (Midi). It is extremely simple to use with a pass / fail indicator that lights up when you plug each side of the cable into the CT and select the number of conductors of the cable. It features a specially designed microprocessor which tests a cable 200 times per second. This cable tester is ideal for musicians soundmen and installers. It is also great for churches schools or bands to quickly and easily test cables.