Rechargeable Invisible Digital Hearing Amplifier Hearing Aids With Charger Case Specification Of Digital invisible Hearing Aid K419 Rechargeable hearing aids Digital ear canal Maximum output (dB SPL):115 Frequency range (Hz):250-5500 Average output (dB SPL...
Rechargeable Invisible Digital Hearing Amplifier Hearing Aids With Charger Case Specification Of Digital invisible Hearing Aid K419 Rechargeable hearing aids Digital ear canal Maximum output (dB SPL):115 Frequency range (Hz):250-5500 Average output (dB SPL... more