Easy Operation:taken from the Charging Case, the Device Will Power on Automatically.the Hearing Aids Controls Allow You to Control Volume.you Can Choose the Volume That Suits You Best for a Good Listening Experience.it Is Perfect Gifts for Family Members with Hearing Loss. Advanced Noise Cancelling:These hearing aids for seniors feature cutting-edge noise-cancelling technology, allowing you to focus on important sounds and conversations while minimizing unwanted background noise. This hearing aids for seniors is perfect for social gatherings, outdoor activities, or quiet indoor settings. Small design:Perfect design to fit tightly in the ear canal with a natural and nearly invisible appearance. Need to worry about falling out or losing it, and no need to feel embarrassed about wearing hearing aids. Intelligent charging case:The charging case can store 100 hours of standby power, which is enough to charge the hearing aids 5 times. Each charge supports 20 hours continuous working time for the device. No more fumbling around with tiny button batteries. Packing Lists Hearing Aids*2, Charging Box*1 Charging Cable*1 Earplugs*6 Cleaning Brush*2 Manual*1 Why do my hearing aids whistle ? Normally, Wearing our hearing aid in error result in the disturbing whistling or squeaking noise coming from device is caused by called feedback. We recommend that few simple steps as followed to reduce or eliminate noise: The first, Please choose the appropriate ear domes according to the size of the ear canal and Make sure the „ear domes“ fit snugly in your ear . If your hearing aid’s ear domes does not fit in your ear properly, sound will leak out and back into the device’s microphone, causing the whistle sound. The Second, Please clean your device with our brush every time . Our ears produce wax naturally to trap and expel foreign substances, but when you have wax build-up in your ears and insert your hearing aids on top of the wax, the sound coming out of the amplifier will be blocked and returned to the microphone, causing a squeal. The Third, Adjust Volume Settings, Avoid setting the volume too high. High volume settings can sometimes cause echoes, try reducing the volume gradually. The Last , Please store your device in clean Case, If the hearing aid’s microphone is covered with wax or debris, it will make a noise. What to do if your hearing aids don’t charge properly？ 1. Check the hearing aids is correctly putted into the charging case. 2.Make sure the charging case has enough power