Because the contact part of the earplug and the ear canal is not completely closed, the
sound amplified by the Hearing amplifiers leaks from the gap and is amplified again by the
microphone, so there will be a howling sound.
How to wear a Hearing amplifiers?
Step1: Ensure the Hearing amplifiers is fully charged
Step2: Turn off the Hearing amplifiers, switch to level 0 and choose the noise-canceling mode
Step3: Place the device close to the outside of your ears, and put the earplugs into the ears in
this way.
step4: Make sure the earplugs can fill the ear canal.
Step5: Then turn on the Hearing amplifiers, turn up the volume little by little
Step6: If the volume is within the acceptable range, we just need to spend some time getting
used to the device.
TIPS
1.It is USB rechargeable hearing aid without frequent battery replacement
2.Please choose an earplug that fits the ear canal, as the gaps can cause noise.
3.Please use the correct wearing method to ensure that the hearing closely match the ear
canal to avoid sound feedback and howling.
4.Do not touch the little loudspeaker which is used for reception with your hands during use,
otherwise it will make noise.