Choose slightly larger earplugs to avoid whistling. Insert the hearing aid into the ear canal and adjust its position in the ear canal until the soft ear tip fully unfolds and fills the ear canal;. If you hear a whistle, check whether the ear (silicone) is suitable, whether the size of the plug is tight.
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1 Pair Mini Invisible Hearing Aids In-Ear Digital Enhancer Voice Sound Amplifier 300mAh with Digital Display Charging Case. 【SMALL AND CONVENIENT DEVICE】It has a miniature appearance comparable to headphones, so you won't attract any unpleasant glances when using it.
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Insert the hearing aid tightly into the ear canal. Natural Sound: This hearing aid is suitable for the people with mild to moderate hearing loss. Equivalent Input Noise (dB): 28dB. USB data cable x1.
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This Powertone F-138 In-Ear Hearing Aid is a quality hearing aid which can help you hear the sound clearly and loudly. - Silicone ear pads in 3 different sizes, suitable for any form of ear. Sound gain: ≥ 50dB.
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Feature - Comfortable: Made of high-quality material, durable and sturdy, comfortable to wear. Ergonomic design, soft and flexible, these hearing aids help you a lot in daily life. 1 x Hearing Aids.
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Why is there a whistling during the wearing process?. We give 3 different sizes of earplugs to reduce howling and noise. Suitable for mild to moderate severe hearing loss (Reference hearing loss map).
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Please be noted that we stock our products in UK, and you will get your package in around 2-3 workdays, while there are some other sellers who claim to be UK stock too, but take more than a week (5-7 Days) to deliver, which are usually China stock in fact. .
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