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There
are several ways to buy Vonia products.
One way is to make an order on the internet.
Visit our website of www.dowumi.com, go to “how to shop”
section, fill out all the necessary information and press submit button
for confirmation |
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It
depends on the degree and condition of hearing loss. A person with
the hearing aid can use our company's headsets and headphones and
can hear sound better without wearing the hearing aid.
However, a person who has impaired auditory nerve system cannot use
Vonia products. |
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It does not do any harm to human body even if a person uses our products
for long
hours.
Hearing through bone conduction is not an artificial way. A man hears
60 percent of sound through air conduction system and 40 percent through
bone-conduction system.
Thus, bone-conduction system is a natural way for a man to hear any
sound, and it has been applied to hearing aid technology for people
with hearing loss since mid 19th century. |
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