These dual, mono earbuds have flexible ear-tips so they will stay in your ears better than those without such tips. They are designed to work with audio devices that have mono earphone jacks such as the PockeTalker Ultra.
When you have this ring alerter on “HI”, you won’t miss the phone ringing. Even with a severe hearing loss and no hearing aids on, it can still “blow your socks off”. At the same time, the built-in light flashes. This gizmo works off the phone line so doesn’t need batteries ever.