Yongrow Hearing Aid Voice Sound Amplifier Hearing Aids Behind Ear Adjustable Health Care

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Brand Name: yongrow
Origin: China Mainland
Model Number: YK-139
Equivalent input noise: <32dB
Frequency response range: 450Hz~3000Hz
Full sound gain: 38dB+-5dB
High frequency average: 118dB+-4dB
Rated power supply current consumption: <10mA
Total harmonic distortion: <10%

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