Bluetooth Hearing Aids Doosl Rechargeable Hearing Loss Digital Hearing Amplifier Devices for Seniors with Noise Cancelling, Volume Control

Product details Doosl Hearing amplifiers for Seniors Rechargeable with Noise Reduction Hearing aids work by magnifying sound vibrations entering the ear.Hearing loss is often treated with hearing aids, and although they aren't a cure, hearing aids offer a potentially life-changing improvement to the way you hear.   # - What to do when you wear the Hearing aid device?   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.     # - How to charge the hearing aid?   1.The hearing aid will beep when the hearing aid is low battery, please charge the hearing aid in time. 2.Use the USB cable to charge the hearing aid. 3.The new hearing aid should be charged for 6 hours for first few times