The instructions are clear and the items that come with this are extremely helpful such as the ton of extra batteries, domes for fitting in the ears, case, salt container for absorbing moisture, sizeable tubes to customize the fit with clear instructions too. The app even has a hearing test which is fantastic for customizing them to your hearing. However, all extras don't replace the product not working after the 2nd day. It's nothing on my end or something I'm doing wrong either. I bought these as a Christmas gift because I wanted my Mom to hear better. She had been struggling for so long and I was so excited to give them to her. I spent hours scouring different companies, different manufacturers, and I really honestly believe that this is company is best way to go, and thought something like this wouldn't happen especially since I put so much time into the research.