Citizens band radio
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Citizens band radio is a land mobile radio system, a system allowing short-distance one-to-many bidirectional voice communication among individuals, using two-way radios operating near 27 MHz in the high frequency or shortwave band. Citizens band is distinct from other personal radio service allocations such as FRS, GMRS, MURS, UHF CB and the Amateur Radio Service. In many countries, CB operation does not require a license and may be used for business or personal communications.
Cobra 18 WX ST II mobile CB radio with microphone
Cobra 50 WX ST Handheld CB Radio
A QSL card issued by a US CB station in 1963
Image of Citizens Radio license 1972 issued by the United States Federal Communications Commission
Two-way radio
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A two-way radio is a radio transceiver, which is used for bidirectional person-to-person voice communication with other users with similar radios, in contrast to a broadcast receiver, which only receives transmissions.
Naval air traffic controller communicates with aircraft over a two-way radio headset
A variety of portable handheld two-way radios for private use
VHF marine radio on a ship
Two-way radio in a fire truck used by firefighters to communicate with their dispatcher