General Mobile Radio Service
(GMRS) is a land-based short-range mobile radio service. It is a short-range radio
servicethat requires a license and is used in the U.S. and provides two-way communications. GMRS is an analog cellular network that uses frequency modulation
. GMRS operates in eight UHF channels plus an additional seven channels that it shares with Family Radio Service (FRS). Transmit power is typically 1 watt to 5 W, with a maximum allowable transmit power of 50 W. Transmission channels shared with FRS service have an allowable transmit power of 5 W. Comparable services are provided by Citizen Band Radio Service (CBRS), which uses CB radio and is used in Europe.