I worked at Trimble Nav in the radio group. 5W for a consumer device is on the high end. UHF base stations often do around 25W-50W+ for wide-area coverage on to

I worked at Trimble Nav in the radio group. 5W for a consumer device is on the high end. UHF base stations often do around 25W-50W+ for wide-area coverage on top of a tower. If you did like a coworker did with a YAGI antenna and accidentally place a base-station onto high-power mode, nearby flesh (<10cm) will receive a significant radio burn.