http://www.emfnews.org/home_protection.html Airtube Headset Do not use the cell phone in enclosed metal spaces such as vehicles or elevators, where devices may use more power to establish [...]

http://www.emfnews.org/home_protection.html

Airtube Headset

Do not use the cell phone in enclosed metal spaces such as vehicles or elevators, where devices may use more power to establish connection. The metal enclosure also acts as a Faraday cage that traps the radiation and reflects it back onto the occupants.

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