Adjustable Amplify Mode: 4 adjustable volume levels and 3 program modes for different environments, this smart sound amplification also programable, making sure the personal sound amplifier works best for listening needs. NOISE REDUCTION: Digital noise reduction and Wide dynamic rang compression WDRC processing. Built in imported silicon microphones and moving iron horn, the hearing amplifier have more clearer sound collection, higher noise-to-noise ratio and sound quality, restoring...