We have a gently used RC Dex. It is a remote control for Widex Hearing aids. Works from back in the day to the present. Easy to use. Has volume control and memory control. No need to use a phone app or work the buttons on your hearing aids. Easy to do with the little remote control.
Our seniors especially love this product. If you lost yours, this is a great piece to use.
It has no warranties now but it is affordable.