Audio Amplifier Voice Enhancement

Audio Amplifier, Voice Enhancement for Listening to Music and Watching TV (for Left Ear) 3 Programs : 1-Normal ; 2-High Frequency Compensation ; 3-Low Frequency Compensation Intelligent Noise Reduction System , Detect and Recognize the Noise Wave, Change the Gain of the Channel Where the Noise is Located, Make Normal Speed More Clearly Ultra-Low Machine Itself Background Noise , and Ultralight Weight Body You Don't Even Feel Wearing It Buttom Volume Control : Press Button to Adjust Volume,It have 7 Levels Volume,Each Press Drop 3dB,Max Gain 39dB ,Min Gain 21dB,When it at Min Volume Next Press Will change to Max Volume Comfort Threshold Control ; Automatic Gain Control-Output for Hearing Protection, No Need to Suffer from Sudden Loud Noise Anymore