It can continue use up to 72-96 hours. Equivalent input noise level: ≤ 29dB+3dB. Output sound pressure level (high-frequency average): 108dB ± 4dB.
1Pair Digital Hearing Aids In Ear Enhancer Voice Sound Amplifier Rechargeable UK
Rechargeable Digital Hearing Aids In-Ear Enhancer Voice Sound Amplifier 1 Pair
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1 Pair Mini Hearing Aids In-Ear Enhancer Voice Sound Amplifier USB Charge
