Gray BTE Hearing Aids With Bluetooth Vigor 402 Digital Hearing Amplifier
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New Product for the Deaf Old People Accessories Hearing Sound Amplifier Medical Earphone Specification Technical Data Vigor U 402RC Peak OSPL 90 ( dB SPL) 115 HAF OSPL 90 ( dB SPL) 110 Peak Gain(dB) 40 HAF Ful on Gain (dB) 35 Frequency Range (Hz) 200-5000 ......
Retone shenzhen Technology Co., Ltd.
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OTC Bluetooth Hearing Aid Amplifier 4 Programms Digital Hearing Amplifier 5 Levels Volume
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Shenzhen Sounds Good Technologies Co.,Ltd
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