So I had a nice pair of Oticon opn but I lost them. One was in a car I sold to the junk yard and one is somewhere in my room..I think. So I got out my backup hearing aids which are Oticon alto. They need a good recalibration, which cost $25. I got them in 2012 so they are worn. My 5 year wait for new ones is next year in august. I just need them to last a little longer.