Your past Q/A on headphones is closed now. I have two hearing aides with Bluetooth capability. But I'm willing to get headphones and wish to A) check what system your guides use and B) which headphone systems work? Do I need a system with different sized jacks? Finally, can Bluetooth work with it?
This post might help, or you could contact the Rick Steves office.
This is what I used with hearing aids on my last tour and it worked fine. I don't have Bluetooth. The main thing is to have a plug that fits into the "whisper" box they lend you for the tour, as this one does.
Dick - How does that work with a hearing aid? I use a hearing aid in my left ear, but a cochlear implant in my right ear. I have no natural hearing at all in the right ear. It doesn't seem that tis device would work for me.