You can use the machine comes with volume keys to control the size of the sound. The near future will be to do an upgrade.
Advantages of the present hearing aid:
1, using a specialized algorithm to reduce the noise.
Than general medical hearing aids sound even louder.
3, the operation is extremely simple, fonts, great clarity.
Keywords: ear, hearing aids, sound amplification.
Tags: hearing aid latency , 助听器 , 助聽器