eBay

These were my father's back-up hearing aids. Just purchased before he had a fall and passed away.

From the Signia website this is how they describe them. "Easily recharged and fully connected

With the revolutionary Pure Charge&Go X hearing aids from Signia, you can move to your heart’s content and hear everything and everyone important to you in crystal-clear sound quality.
Wherever you go.

Thanks to their game-changing acoustic-motion sensor technology, Pure Charge&Go X hearing aids understand your personal hearing environment in greater detail than ever to deliver sound precisely tailored to you.

Pure Charge&Go uniquely offers the revolutionary wireless inductive charging with the following benefits:

Increased ease of use because exact placement of the device in the charger's cradle is not required
No electronic contracts that can collect dirt and debris
Improved water, sweat and dust resistance

Many hearing aid users do not like the sound of their own voice as it sounds loud and unnatural. Our revolutionary OVP (Own voice Precessing) function provides you with a natural sounding own voice combined with optimal hearing of all other sounds for the most pleasant, natural listening experience."