I bought the cross over model roughly 2 years ago and have sent the aids back to the manufactory numerous time to be fixed and they come back with the same problem. The audiologist is at a lost. She doesn't know what to do and neither does the company. My aids keep shutting off, when I turn them up to hear some one there voice is so distorted I cannot understand what there saying. Starkey keep trying to blame me. I don't see how I can possibly keep shutting and aid off every few seconds. Why would I want to? I want to hear. $4800 later and 2 years of the audiologist trying to fix them and I still cannot hear. I wouldn't recommend this aids to anyone.