The JVC KA-M790 Multicore Studio Interface Unit is a compact interface unit that connects to the back of the GY-HM790 shoulder-mount camcorder to provide full studio/EFP capabilities. Available functions include intercom controls, call switch/indicator, and a power source select switch. A 26-pin connector lets you use existing 26-pin control cables, while teleprompter and intercom connectors provide further studio functionality.