I bought this to upgrade the King audio panel in my Mooney. Well, health concerns forces me to "de-plane" so installing this would only mean more money wasted. 

This has NEVER even been out of it's box and as you can see in the photos is still in it's hermetically sealed anti-static envelope. 

Good deal for someone! Incidentally ... these are a direct "plug-in" to a Garmin wiring harness. If you've never flown behind one of these panels you will be in for a real treat!!! 

This particular model has a built-in MP3 player so you may listen to and your guests may listen to your favorite music, which drops out in the pilot/copilot headsets when you receive a radio call. You can also isolate "flight deck" calls from your passengers. Very nice !!