Hearing Aid Mini Sound Amplifier Listen For Deafness Digital Wireless Hearing Aid Gift Invisible Adjustment Tools

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• Hearing Aid Mini Sound Amplifier Listen For Deafness Digital Wireless Hearing Aid Gift Invisible Adjustment Tools Common for left and right ears！！！！！！ Common for left and right ears！！！！！！ Common for left and right ears！！！！！！ Parameter Attributes 1.6 channels + 12 bands 2.Intelligent noise reduction system 3.Adaptive acoustic feedback processing 4.Main wind noise suppression management system 5.Multi-channel expansion 6.Tinnitus masking function 7.Adaptive volume control in different environments 8.Ultra-low background noise 9.Trimmer VC 10.Rich mid-range and high-frequency sounds. Technical Speifcaiono MAX OSPL90(dB SPL) ：111 HFA OSPL90(dB SPL) ：107 Peak Gain(dB) ：30 HFA FOG(dB) ：28 Frequency Range ：F1≤200Hz-F2≥4800Hz THD at 500Hz ：0.4% THD at 800Hz ：0.2% THD at1600Hz：0.1% Eq.Input Noise Level(dB) ：25.3 Battery Current Drain(mA) ：1.2 Attack Time(ms) ：2 Release Time(ms) ：53 Prompt: There are Whistle as you put the battery into the hearing aid .Please donot worry .because the air presure will make Whistle. ​1.Please adjust lower volume . ​2.Choose the suitable ear plug ​3.Make sure if you put the earplug tightly,sound leak will make the Whistle.