I have Unitron behind the ear hearing aids, rechargeable, Bluetooth to my phone, etc. I had to have custom molds made for my ears - I have extremely small & curved ear canals that don't hold pods (or any earphone that doesn't include a headband). Expensive since they are through an audiologist, but my insurance covers the full price with replacements every 4 years & Unitron warrantees them for 4 years. I'd love to be able to try the iPods, but they won't work for me.