Posted this elsewhere but didn't get a response. My Elite 5 gold was recently stolen... Just purchased an elite 5 Chirp Gold to replace it. I had the ice pack before with the other unit, but it happened to be part of the package when the thief got away with it. This is a question for those that bought the Chirp separate from the ice pack... Did you have to buy the blue plug to use it in the ice pack or was plug-n-fish out of the box??? I haven't been able to locate pictures of the back of the unit so I'm curious. Thanks!