"Hear" are 2, GREAT sounding hearing aids! Don't let the size fool you, they are powerful! They have been thoroughly cleaned, sterilized and quality checked by a licensed Hearing Instrument Specialist. They are in perfect working order. They are color-coded: Red marking for the Right ear and Blue marking for the Left ear.
They have a volume control to keep sounds comfortable, a low-cut tone control to help shape the frequency slope to help match your individual needs better - turn the little, yellow dial to your specific preferences. They use size 10 batteries and some will be included. Also, I am providing soft-wraps to provide a more snug fit and/or sound retention. However, they can be reshelled for a custom fit at just about any hearing aid retailer.
Good Luck and Thanks for LQQking !
It is in your best interest to see a doctor or a hearing professional for evaluation before wearing any hearing aid.