JINGHAO D590 amplify speech while reducing background noise, making it easier and more comfortable for you to hear in noisy settings.

The sound quality is consistent, long lasting, and sharp, with almost zero whistling or feedback .

You can even control the volume for your individual needs. Works great for high tones and TV dialog as well.

Better Hearing Daily for Hearing Loss, don't leave hearing loss untreated.

Keep that part of the brain active with these hearing aids. Reduce the risk of cognitive decline with JINGHAO D590.

1) Why there are some background noise?

Actually, it is the electric current sound existing in all good machines. Generally, the higher the power, the greater the static sound.

√ Turning on after put it in ears, then turn up the sound gradually. Generally, You will get used to it after 2-3 weeks.

2) What causes the squeal?

If the ear dome is not inserted well into ear canal or air leaks at the ear dome edges, when the device is close to hand or wall, a certain amount of sound will go back into the microphone. The sound is re-amplified which causes that annoying whistle.

√ Try and select suitable ear dome. Put the ear dome into the ear canal and make sure it fits snugly inside. Turning on the device after put it in ears.

3) Can't Charge Normally？

√Slightly adjust the position of hearing amplifiers for a perfect connection.

√The light turns yellow when it is connected well; the light turns green when it is fully charged.

Clean your device regularly to prevent build-up of wax. Keep the device functioning properly.

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