Please note:

If the earmuffs are not completely inserted into the ear canal or the air leakage of the earmuffs will cause electrical noise or whistling, please don't worry,It's normal,this is the smart chip is suppressing howling, just replace the appropriate earplugs.Turn off or lower the volume before inserting the instrument in your ear.

Securely position the instrument into your ear. Once the hearing aid is properly seated in your ear,the howling will generally stop.

APP download Please download the app at this URL:

Android:

http://helphearingaid.top

IOS:

https://apps.apple.com/us/app/widersonic/id1577782600

Feature:

1.【Your Exclusive Audiologist】:Suitable for Moderate to Severe Hearing Loss Person.Let you enjoy the sounds of nature again. No more missing the conversation with your family and friends.
2.【Intelligent Noise reduction】These hearing aids use digital signal processing.Built in 12 channels,US-made Digital core for super natural and clear sound quality, no background, no whistling.
3.【Bluetooth & APP CONTROL】:With the latest Bluetooth 5.0 technology, let you listen more clearly. The new exclusive App features more personalization options, you can adjust the volume and the bass treble via APP. The APP Widersonic is available for both IOS and Android.
4.【Long Working Time】: The hearing aid is equipped with a portable charging case,The Hearing aid can Working 20 Hours Once Full Charged，It takes 1.5-2 hours to charge the charging box once.

Technical Specification:

1. Output. OSPL90 Max.≤ 105dB

2. FOG50 MAX Gain ≤ 33dB

3. EQ Input Noise ≤ 33dB

4. FREQUENCY RANGE(Not narrower than): 200Hz-4500Hz

5. Working Current ≤ 7mA/

6. Total Harmonic Distortion <5%

7. Working Voltage D.C 3.7V

8. Play Time: 8 hours

Note:
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.
5.Keep the ear plug clean
6.Remove the battery if you don't use it for long time.

Product：

1 x Charging Box

1 x Pair Of Hearing Aids

3 x Pairs Of In-Ear Tips

1 x Manual

1 x Usb Type-C Charging Cable

Ways to avoid Whistling /noise:

Whistling may occur if the hearing instrument is turned on,but not securely seated in your ear.this is normal.the whistling will stop once the device is properly seated in your ear.

Whistling is common for small amplifiers and is known as "Feedback".it is caused by amplified sound from the hearing aid getting back to the micropphone and being re-amplified.The folloring tips will help reduce the occurrence of feedback whistle:

1.Reduce the volume. Turn off or lower the volume before inserting the instrument in your ear.

2.Securely position the instrument into your ear. Once the hearing aid is properly seated in your ear,the whistling will generally stop.

3.Clear the ear canal of wax or debris. Check your ear with help.

4.Change the ear piece or tubing Change a new one or a different size one.the appropriate choice of earplugs and plugged,Make sure the tubing is not broken or torn.

Bluetooth Hearing Aid Rechargeable Hearing Aids Severe Hearing Loss Amplifier