Tips for buyers:
Causes of whistling/noise: In order to make a small hearing aid, the internal amplifier and microphone are placed close to each other. The sound is continuously received and expanded, so there is a certain possibility of whistling after power-on. At present, small hearing aids and high-power hearing aids on the market are difficult to avoid whistling, and only fully functional digital hearing aids can avoid whistling.
Ways to avoid whistling/noise:
1. When the power is large (the amplified sound is large), it is more likely to produce howling. Therefore, gradually increasing the bass volume can effectively prevent howling.
2. When the ear canal is completely closed, there is no whistling sound. So after cleaning the ear canal, put on the hearing aid, test the earplugs from large to small, find the most suitable earplugs, and ensure that there is no air leakage.
3. After the hearing aid enters the ear canal, it is recommended to push the hearing aid with your fingers and hold it for 1-2 seconds, then release it to fully extend the earphone.
4. In the shutdown state,insert it into the ear. Make sure that the earbud completely fills the ear. Then turn on the power button and slowly increase the volume to a suitable volume.
5. Users who have not heard a sound for a long time may need to persevere, continue to stimulate the growth of the hearing nerve, and you will hear after a while. If you are not sure whether your hearing aid is working properly, you can try the product on a person with normal hearing.
In addition:If you do not know how to use it or there is a problem with your hearing aid, please do not rush to leave a negative review and contact us. Thank you.

Describe:

1. Peak Gain (dB): 117dB, suitable for moderate to severe hearing loss (refer to the Hearing Loss Chart)

2. Rechargeable case charging: Your hearing aids can be charged using the detachable charging case. (You'll need to charge the detachable charging case first.) It's portable, and it saves you the hassle of constantly buying a coin cell battery.

3. Charging time: charging for 4-6 hours, it can work for 20 hours, the indicator light is red when charging. Turns off when fully charged. (For removable charging case)

4. Especially designed for the hearing-impaired, more fitting to the ear canal. No pain even when worn for a long time.

5. If the earmuffs are not fully inserted into the ear canal or air leaks from the earmuffs, it will cause an annoying whistle. We offer 3 different sizes of ear tips to reduce whistling and noise.

Product parameters:

Peak 0SPL 90(dB SPL): 117dB

HAF OSPL 90(dB SPL): 110dB

Peak Gain (dB): 32dB

HAF/FOG gain (dB); 29dB

Frequency range (Hz): 300-3500Hz

Equivalent input noise (dB): 25dB

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G35

Product parameters:

Peak 0SPL 90(dB SPL) ≤105dB+3dB

HAF OSPL 90(dB SPL): 102dB士4dB

Peak Gain (dB): 30dB士5dB

HAF/FOG gain (dB); 29dB

Frequency range (Hz): 300-5000Hz

Equivalent input noise (dB): 30d

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G37

Product parameters:

Peak 0SPL 90(dB SPL) ≤120dB+3dB

HAF OSPL 90(dB SPL): 115dB士4dB

Peak Gain (dB): 30dB士5dB

HAF/FOG gain (dB); 29dB

Frequency range (Hz): 300-5000Hz

Equivalent input noise (dB): 32