invi

One of my grandparents on my dad side is actually needing a good invisible hearing aids thus explains our frequent mall tripping to check out stores that offers such stuff. Anyways, when I first heard about that invisible thing, it made me think if that is really possible as I can't seem to imagine how such can be made invisible. But then again, after searching online, I found out that it is indeed true! There's an invisible hearing aid that can be buy!