Rechargeable Hearing Aids For Deafness Digital Sound Amplifier Wireless Headphones Ears Tools Fashion High Quality

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Features 1.Low Equivalent Input NoiseFeatures 2.Super Clear Sound 3.Low Frequency Cut Filter 4.Integrated Analog 5.Volume Control 6. 'H' control for low frequencysuppression 7. N' control for normal 8. o' control for turn of power 9. Rechargeable lithium -ion battery 10.Charging time: 2.5 hours 11.Battery life: 40 hours per full charge

​Technical Specification: ​1.OSPL90 ​Technical Specification: ​1.OSPL90 ​ MAX AT 2900Hz 125.3 dB ​ HFA AVG : 120.8 dB ​2.FOG5O ​ MAX AT 2200Hz  dB : 45.7 ​ HFA AVG dB : 39.3 ​3.FREQUENCY RANGE   Hz:293-3827 ​4.Harmonic distortion ​ 500Hz : 1.1% ​ 800Hz : 1.7% ​ 1600Hz : 0.1% ​5.EQ INPUT NOISE : 25 dB

​This term wearing without pain, multichannel intelligent noise reduction, adaptive feedback processing, noise suppression system, tinnitus shielding function, adaptive volume control.So choose us, you not only did not spend too much money, but also improved the quality of life, happier and happier！Our products are certified by authoritative organizations, formal production plants, and customer satisfaction evaluations!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.