Retone Digital Rechargeable Open Fit Hearing Aids 4 Channels WDRC Amplifier
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... gain(dB) 35 Frequency Range(Hz) 500-5500 EQ input noise(dB) 30 Battery Size Ni-MH Battery Current(mA) 1.0 Signature feature - Portable charger case - Indicator lights for battery - 100%...
Retone shenzhen Technology Co., Ltd.
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