How do I ensure proper fit of the headphones in my ear?

Select from the multiple size rubber earbuds (Small, Medium, and Large) provided to find the right size. Proper fit should be comfortable, but have a secure fit in the outer ear canal. A medium size earbud comes attached.

DefenderShield Headphones DefenderShield Headphones

 

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US Government Study Finds How Cell Phone Radiation Causes Cancer

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