mini hearing aid S-188
Products Detailed
mini hearing aid S-1881.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 ... |
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