ISO FDA Approved Over The Counter Hearing Aids For Tinnitus
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One fit all OTC hearing aids for online selling Specification Vigor 402 Vigor 402BT Design Digital Open-fit Digital Bluetooth Open-fit Volume control Rocker-type II Rocker-type II Peak OSPL90(dB SPL) 113 113 OSPL90-HFA(dB SPL) 103 103 Peak Gain(dB) 30 30 ......
Retone shenzhen Technology Co., Ltd.
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