This is a matrix switcher from IDK Corporation. I received it from an acquaintance, but I have no idea how to use it or what it's for. My acquaintance said that people who need it find it very useful. I looked it up online, and the manuals seem to be available for download in PDF format ^-^ The list price seems to be 1.68 million yen, so it's quite expensive. Please only inquire if you know what you're doing.