I know most of you are flying certified airplanes with real radios but to us experimental guys weight and wiring are the enemy. I picked one of these up from Aircraft Spruce this week. It's a pretty slick little unit. It's tiny and weighs almost nothing. I bought the A24 version which plugs directly into my handheld. I have an external antenna on my plane. You can also buy a $36 adapter and pipe music or whatever in. Not a bad little unit for intercom, comm, and music for $140. The only downfall is it's 9V battery powered. I'll let you all know how it works out in the airplane.