So I've got several of those Audiovox/Radio Shack/Cobra type walkie-talkies that my family uses in and around the mall and shopping areas. They work great and they all have a voice activated control along with connections for microphone and earbuds. I got to thinking - why can't we use the VOX and ear buds for passenger/passenger communication with the walkie-talkies in our pockets? Has anyone done this? It's not a Starcom1 one or anything but hey, it's $50.00 for a pair versus $450.00 for the Starcom1.
I think that would work. However if you both wear ear plugs you will have to adapt the ear piece of the radio to seal better. Typically the are designed for staying in your ear when walking around not high speed motorcycling or snugged in by a tight fitting helmet.
I have not tried using 2 radios with Sally on back. I took a trip with a friend once who had an old set so we tried using them bike to bike. After one hour my right ear was in agony from the wind noise getting around the the ear piece and the ear piece being pushed by my helmet into my ear. I gave up and gave back the radio and put an ear plug in.
The VOX *might* be affected by wind noise. Again they are designed for walking around not noisy motorcycling.
I have Cobras and Midlands, and using one with the Starcom works fine for bike to bike.