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• Tips for buyers: Causes of whistling/noise: In order to make a small hearing aid, the internal amplifier and microphone are positioned near to each other The sound is continually obtained and expanded, so there's a bound option of whistling after power-on At present, small hearing aids and high-power listening to aids for sale are challenging to avoid whistling, and solely solely functional electronic listening to aids can avoid whistling Ways to circumvent whistling/noise: 1 When the flexibility is massive (the amplified sound is large), it is prone to produce howling Therefore, step by step increasing the bass volume can effectively prevent howling 2 When the ear canal is completely closed, there is not any whistling sound So after cleansing the ear canal, put on the listening to aid, verify the earplugs from large to small, find probably the most appropriate earplugs, and confirm that there is no air leakage three After the listening to relief enters the ear canal, it's endorsed to push the listening to aid along with your arms and preserve it for 1-2 seconds, then release it to totally make bigger the earphone 4 In the shutdown state,turn the amount of the hearing relief to the bottom level, then insert it into the ear Make sure that the earbud completely fills the ear Then activate the power button and slowly expand the quantity to a suitable quantity 5 Users who've no longer heard the sound for a long time may cause hearing loss due to the long-term failure to listen to the sound, resulting in the hearing aid still not able to listen to the sound Please persevere, proceed to stimulate the expansion of the listening to nerve, and you may pay attention after a while If you aren't yes whether your listening to relief is operating properly, you may attempt the product on a person with regular hearing 6 Please eavesdrop on cleansing the ear canal and maintain the earplugs clear In addition:If you do not know the best way to use it or there's a issue with your listening to aid, please do not rush to leave a damaging review and contact us Thank you Features: 1 Mini BTE Design 2 High-power chip noise reduction three operating modes, multifunctional design 4 rechargeable (no need to replace the battery) five Charge 6-8 hours, work as much as 20 hours How to use: 1 Please payment the product first, USB charging for 4-8 hours 2 Choose ear methods that suit your ears Insert and rotate the ear cups to cause them to secure, desire the ear tips that fit your ears 3 Put it on and modify the volume to an acceptable volume Turn down the amount to the minimal to fit varied environments four Select diversified modes and turn to "H" or "N" mode (where there's noise, the switch can be adjusted to "H" mode to lessen low frequency noise) Specification: Peak OSPL 90(dB SPL):118dB HAF OSPL 90( dB SPL):110dB Peak Gain(dB):36dB HAF/FOG Gain (dB):32dB Frequency range(Hz):300-3200Hz Distortioan : 500Hz:5% 800Hz:3% 1600Hz: 3% Equivalent Input Noise(dB):28dB Voltage:D Battery size :Built-in NI-MH Battery Current:≤2 Charging Tine(H):6~8 Once price working Time(H):20h Size;49×42×9 mm color:Beige/Blue Package Included: 1 x Hearing Aid four x earplugs (different sizes) 1 x User Manual 1 x Cleaning Brush 1 x USB charging cable with charging head Warn: Charger input: AC100-240V, 50-60hz/0 Charger output: 5v, 1000ma 1 Please use the corresponding charger to fee the product, otherwise the product could also be damaged 2 If you should update the charger, please use the charger suitable for this product If the product is charged with an mistaken charger, it'll cause harm to the product 3 Please don't use hearing aids at high quantity for a protracted time, it's going to damage your listening to four Please do not use it in a damp environment, please aren't getting near to the heat source five Please be careful to guard the hearing reduction and avoid falling to the floor

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