IiWoxzI9Ytw, Resound Linx2 iPhone Hearing Aid, This is my review of the Linx2 9 hearing aid. I wore it for over two months testing it out in various environments and situations. I linked it to both my iPhone and iPad. I really enjoyed the easy transition from my phone to my hearing aids, and loved the control via the Resound (free) app. As the video explains, I can control bass, treble, background noise, the microphones and more!,