USB Rechargeable Hearing Aids Mini Ear Hearing Amplifier Adjustable Tone Hearing Aid Sound Amplifier Hearing Device for Elderly

Suitable for mild to severe hearing loss people. Adjust volume to minimum before wearing. Super invisible, not easily to be seen. Make sure there is no gap or air between device and ear. Mini size and light weight. Make sure there is no gap or air between device and ear. It only has usb line nocharger. Tips for buyers: The cause of howling/noise: The internal amplifier and the microphone are close to each other of the hearing aid, and the sound is continuously received and expanded, so it has a certain possibility of produce howling after power-on. At present, small hearing aids and high-power hearing aids on the market can hardly avoid howling, and only full-digital hearing aids can avoid howling. Ways to avoid howling/noise: 1. When the power is high the amplified sound is large), howling is more likely to occur. Therefore, gradually increasing the volume from low can effectively avoid howling. 2. When the ear canal is completely sealed, there is no howling sound. Therefore, please u