RIGHT EAR Button controls 3 listening modes with volume control.Selection allows you to pick different mode & volume so that you can find the best combination for your ears .Easy comfortable fit..NO NEED FOR AUDIOGRAM HEARING TEST TO PURCHASE.Shipped same business day of purchase before 3pm ET.USA supplier with NO HASSLE RETURN POLICY.
HEARING LOSS IS THE BIGGEST MODIFIABLE RISK FACTOR FOR DEVELOPING DEMENTIA .Even greater than smoking. FOR BETTER BRAIN HEALTH  PRESERVE YOUR HEARING.