Hi. Carrie!
Like you, I was very concerned about the Bluetooth signal. And I expressed my concerns to my audiologist. I told her, "You might think I'm crazy, and I know everyone says Bluetooth is safe, but I don't want to take the risk of any damage to my brain from EMF or Bluetooth sources." So, she listened to my concerns and told me that she was going to recommend a CROS unit where I can turn off the Bluetooth.
I replied, "If I turn off the Bluetooth, will the device still work?" And she said that it did, but it would not connect to my phone app, TV, etc , but it still would send the audio from the transmitter to my receiver in my good ear. To which I replied, "I don't want any EMF going through my brain." She said that the model she was recommending did not penetrate the brain, but used bone conduction and traveled on the outside of the skull. I was very skeptical, but when I read the claims of the manufacturer, they said the same thing.
When I charge my CROS system overnight, the charger automatically turns the Bluetooth back on. So, every morning, I turn the Bluetooth off, and it stays off until I put it back on the charger.
So, I was very firm with my audiologist on what I wanted and didn't want, and she listened to my concerns to match my expressed needs. And I have not noticed any worsening of my tinnitus or my hearing. I purposely didn't list my model here because I'm not trying to promote any brand, and there are newer and better units which have come on the market since I purchased mine. But I hope my experience is helpful for you.
Best wishes on your continued journey!
Don