Invisible Digital Rechargeable s for Seniors Hearing Loss Hearing Amplifier with Noise Cancelling wit

Product Features: 1.The product looks like a BT headset, which can protect your privacy. You don't have to worry about discrimination anymore. ​2.Fine quality material, safe and non-toxic. 3.Mini, lightweight and invisible, comfortable for long time wearing without pain. 4. Intelligent and high quality. Advanced digital signal processing technology can intelligently reduce environmental noise and provide clear, high-quality natural sound. ​5.Full digital circuitry, low power consumption, adaptive noise reduction, and can prevents howling. ​6.Easy to charge. After charging for 2 hours, the item can work for more than 12 hours. ​7.Rechargeable design;the built-in power bank can be charged more than 6 times. ​8.Easy to operate and use. ​ ​Product Parameter: ​1.Maximum OSPL90:≤117dB±3dB ​2.High Frequency Average OSPL90:109dB±4dB ​3.Average Gain:25dB±5dB ​4.Frequency Response Range:400Hz-4500Hz ​5.Equivalent Input Noise Sound Level:≤29dB+3 ​6.Total Harmonic Distortion:≤7% ​7.Related Power Supply:≤6mA ​8.Adaptation range: mild - severe ​9.Working current: 1.4mA Prompt 1.Adjust volume to the minimum before wearing; 2.Choose an earplug of slightly bigger size to avoid whistler; 3.Increase volume gradually to avoid sudden increase in sound; 4.If you hear a howling, check the ear (silica gel) is appropriate and whether the size of plug is tight, the appropriate choice of earplugs and plugged, make sure no air leakage; 5.Keep the ear plug clean;6.Remove the battery if you don't use it for long time.