Input Noise:≤26dB±3dB. Max sound out put: 126±3dB. Sound gain:≥ 28dB±5dB. 2 Main Unit. - Which is convenient and comfortable to wear.
1Pair Rechargeable Digital Hearing Aids In-Ear Invisible Sound Voice Amplifier
1Pair Rechargeable Digital Hearing Aids In-Ear Invisible Sound Voice Amplifier~
