Invisible Single Sided Deafness Hearing Aid Retone Sound Amplifier For Seniors
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... Nicely Without Discomfort Easy to Use Up and Down Volume Buttons Low Power Consumption Long Time Using Whole Day Mini invisible size Technical Data Technical Data K-19 Peak OSPL 90 ( dB SPL) 115 HAF OSPL 90 ( ......
Retone shenzhen Technology Co., Ltd.
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