I recently purchased my first a/c, unfortunately it only has a 2 place
intercom. I don't really want to go through the trouble of installing a four
place intercom for the few occasions that I take backseat passengers. I have
looked (online) at the portable intercom systems but I am not sure how they
connect and if they will be compatible with my current intercom. Do these
things just plug and play? Any experiences that you can relate will be
greatly appreciated.