Medic Therapeutics Hearing Aid with Rechargeable Carrying Case

New open box Advanced feedback cancellation means you won't experience a whistling sound The hearing aids are a universal fit for your left and right ear so you never need to worry about putting them into the wrong side. Charging time - 4-5 hours No batteries required 3 Program Modes: Program Mode 1: Normal Output: In this mode the output sound is based on the real environment Program Mode 2: Low Frequency: This mode should be used in a noisy environment to cancel background noise Program 2: High Frequency: This mode should be used in quieter environments to help with feedback and making sounds louder.