FMRS/GMRS walkie-talkies are dual-service radios that allow users to communicate using either FRS or GMRS frequencies. 462.5625- 467.7125 MHz Users are still required to have an FCC license to transmit over the GMRS band. Though it's not regularly policed, if you're caught using the GMRS band without a license you would be subject to FCC fines enforceable by law. However, no license is necessary if you only use the FRS frequencies. FRS/GMRS radios with a higher wattage potential are designed to power down to the 0.5 watt maximum when broadcasting on the 7 FRS frequencies.
FRS/GMRS hybrid radios are able to communicate with FRS, GMRS and other FRS/GMRS hybrid radios.