The cause of howling/noise: To make a small size hearing aid, the internal amplifier and the microphone are close to each other. The sound is continuously received and extended, so it has a certain possibility of producing howling after power-on.
eBay
About this item【Advanced Background Noise Cancellation】Our digital sound device are designed to effectively handle background noise to help you focus on the sounds and voices you want to hear. Whether you're at home, traveling, or outdoors, these sound devices are ready to enhance your world with clear, vibrant sound【Easy to operation】Simply select the included ear domes that fit you best, Long press button for turn on the device. It owns multifunctional button to switch mode program and volume.【Smaller, Even More Invisible】This sound devices are ergonomically designed, miniature earbud design provides a superior wearing experience. soft and comfortable to the touch, and fits tightly into the ear canal without falling out easily. They look si.
eBay
1 Pair Mini Invisible Hearing Aids In-Ear Digital Enhancer Voice Sound Amplifier 300mAh with Digital Display Charging Case. 【SMALL AND CONVENIENT DEVICE】It has a miniature appearance comparable to headphones, so you won't attract any unpleasant glances when using it.
eBay
Participate in pleasant conversations with family, friends or co-workers with our hearing aids for adults. Ideal for mild to moderate hearing, our hearing devices for elderly people assist in watching TV, on the phone, in normal discourse and more.
eBay
Shipping Conditions: Attention: The goods will be shipped from UK Delivery time: 2 to 4 working days - Support 60 days return policy - Reply within 24 hours Features: .
eBay
To Dear buyer, ✅The delivery time (EDT) on the listing is only the estimated delivery time of eBay. ✅Please dont worry about the delivery time,usually it only takes 2-3 days to arrive you as we ship the package from UK via Royal Mail. ✅Any delay, we will send you an email in advance.Please rest assured to buy. ✅Please contact us BEFORE you give us neutral/negative feedback or open the return request, so that we can satisfactorily address your concerns. Attention: The goods will be shipped from UK - Support 60 days return policy - Reply within 24 hours Features: .
eBay
Features1. Suitable for mild to moderate severe hearing loss (Reference hearing loss map)2. Mini-size hearing aid is a powerful unit with noise reduction feature, perfect for those who want precise sound amplification, it is so small that others will hardly notice.3. Light and comfortable: device is extremely light, it can be comfortably worn in either ear. With the spring like connection, it can fit in all sizes of ears.4. A10 battery, low power consumption. Long time service which good for travel.5. Analog, digital hearing aid, 2/4/6 channels are available;6. Easy to Operate: Medium size in-the-ear hearing aids, with large volume buttons and battery compartment, easy to operate for the elderly and adults.7. If the ear dome is not completely fill into ear c.
eBay
Sound gain:>= 35dB+/- 5dB. Total harmonic wave distortion:<= 5%. Input Noise:<=32dB. Max sound out put:118+/- 3dB. Main unit, Charging 2~3 hours for 20 hours use.
eBay