1 Pair Hearing Aids for Seniors Rechargeable with Noise Reduction, USB Hearing Aids for Adults, Hearing Amplifier for Adults Hearing Loss Universal Ergonomic Sound Amplifiers with 48H Battery Life, Comfortable Fit with Ear Caps

1. This hearing aid is via USB, eliminating the need for frequent battery changes.2. Select an earplug that fits snugly in the ear canal to prevent noise caused by gaps.3. Properly wear the hearing aid to ensure a close match with the ear canal, preventing feedback and whistling sounds.4. Avoid toung the small speaker used for reption with your hands during use to prevent noise.

5. When using hearing aids for the first time, some noise is normal.Question and Answer: The reason for the loud screeng sound from the hearing aid and how to resolve it. When the earplug and ear canal connection is not fully sealed, the amplified sound leaks out and gets amplified again by the microphone, resulting in a feedback loop causing the screeng sound.

Solutions: 1. Start by setting the volume to the minimum, then For Switch on the hearing aid after ensuring a proper fit. 2. Select appropriate earplugs to ensure a tight seal in the ear canal.