The Palmer MCT 8 is a cable tester for Speakon, BNC, Cinch, DIN 5-pin, 6.3mm jack mono/stereo, 3,5mm jack and XLR. The new version of the MCT-7 cable tester, the MCT-8 has several new and interesting features. Any wire or cable with any plug can be tested using the supplied test cables. Test results are shown visually by LED and audibly by buzzer. The (supplied) 9V battery is installed in a slide-in compartment for easy replacement.