The new version of the MCT-7 cable tester, the Palmer MCT-8 has serveral new and interesting features. Any wire of 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. Connectors: Speakon, XLR male, XLR female, Phono, DIN, 1/4" Jack, Banana.