Polaroid Digital AIR 3D, Use And Maintenance Manual

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Hearing aid description
The Digital Invisible 3D Polaroid hearing aid is digital, with 4 signal processing
channels, intelligent and adaptive noise reduction system, highly effective acoustic
feedback suppression function.
The Digital Invisible 3D Polaroid hearing aid helps the user not only to have a clean
hearing in a quiet environment, but also in a noisy environment.
The product design meets the ergonomics with comfortable and powerful
functions.
The description is the same for the Digital Micro 3D, Color Digital Micro 3D,
Color Digital Invisible 3D Polaroid Hearing Aid.