Did you even try googling? <a href="https:&#x2F;&#x2F;www.fcc.gov&#x2F;consumers&#x2F;guides&#x2F;human-exposure-radio-frequency-fields-guidelines-cellular-and-pcs-sites" rel="nofollow">https:&#x2F;&#x2F;www.fcc.gov&#x2F;consumers&#x2F;guides&#x2F;human-exposure-radio-fr...</a> <a href="https:&#x2F;&#x2F;www.fcc.gov&#x2F;engineering-technology&#x2F;electromagnetic-compatibility-division&#x2F;radio-frequency-safety&#x2F;faq&#x2F;rf-safety" rel="nofollow">https:&#x2F;&#x2F;www.fcc.gov&#x2F;engineering-technology&#x2F;electromagnetic-c...</a>