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mini hearing aid S-188

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mini hearing aid S-188

mini hearing aid S-188

1.Max Sound Output: 127dB ± 4dB 2.Max Sound Gain: 48dB ± 5dB 3.Harmonic Wave Distortion: f<1000Hz≤15%,f>1000Hz≤10% 4.Input Noise: ≤32 dB 5.Frequency Range: 450HZ~3500HZ 6.Working Voltage: 1.4V 7...

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