The purpose of the Amateur Radio Service is advancing skills in the technical and communication phases of the radio art. Governments have long recognized the value of experienced radio operators ready to bring their equipment and expertise to public service or emergency uses. There are over 800,000 amateurs in the United States. The FCC regulates and enforces the Amateur Radio Service rules in the United States. FCC rules always apply. An amateur licensee can operate with frequencies and power that travel worldwide. Citizens Band is limited to a power of 5 watts (about the same as a night light), while licensed amateurs can operate with up to 1,500 watts.
The Citizens Band Radio Service (CBRS) is a private, two-way, short-distance voice communications service for personal or business activities of the general public. It also may be used for voice paging. It is authorized 40 channels between 26.965 MHz and 27.405 MHz. The service is licensed-by-rule so the general public can use the devices without having to obtain a license and channel sharing is achieved through a listen-before-talk etiquette.
The Family Radio Service (FRS) is a private, two-way, short-distance voice and data communications service for facilitating family and group activities. The most common use for FRS channels is short-distance, two-way voice communications using small hand-held radios that are similar to walkie-talkies. The service is licensed-by-rule so the general public can use the devices without having to obtain a license and channel sharing is achieved through a listen-before-talk etiquette.