What factors determine RF energy exposure?

A cellular telephone user's level of exposure to RF energy depends on several factors, including:

     • The number and duration of calls.
     • The amount of cellular telephone traffic at a given time.
     • The distance from the nearest cellular base station.
     • The quality of the cellular transmission.
     • The size of the handset.
     • How far the antenna is extended.
     • Whether or not a hands-free device is used.

This answer is based on source information from the National Cancer Institute.