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analog hearing aid V-99

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analog hearing aid V-99

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analog hearing aid V-99

Max Sound Output: 129dB ± 4dB Max Sound Gain: 55dB ± 5dB Total Harmonic Distortion: ≤5% Frequency Range: 450~3500 hz Equiv Input Noise: ≤30 dB Working Voltage D. C. 1.5V Working Current: ≤4 mA ...

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