CB radio uses the same frequencies for sending and receiving on each channel, which is why two people cannot talk to each other at the same time (see half-duplex).

Early CB radios operated on the 460–470 MHz UHF band, but on September 11, 1958, the FCC created Class D, which designated 23 channels on 27 MHz for use by CB radio operators.

Since the frequencies for CB radios operate within short-range communication, they're best for individuals or smaller groups. The CB radio band runs on the 27 MHZ frequency range.

Two-way radios fall into one of three types: Citizens’ Band (a.k.a. CBs), General Mobile Radio Service (GMRS), or ham. They all operate on different frequencies and have varying wattage outputs ...

Originally, there were only 23 CB channels in the U.S.; 40-channel radios did not come along until 1977. In the 1960s, channels 1 through 8 and 15 through 22 were reserved for "intrastation ...

There are several reasons why CB radios are still the go-to radio choice for truckers. One key reason is licensing -- unlike CB radios, GMRS requires an FCC license that costs $35 for 10 years and ...

There are several reasons why CB radios are still the go-to radio choice for truckers. One key reason is licensing — unlike CB radios, GMRS requires an FCC license that costs $35 for 10 years ...

Somehow [hvde] wound up with a CB radio that does AM and SSB on the 11 meter band. The problem was that the radio isn’t legal where he lives. So he decided to change the radio over to work on… ...

Because radio frequencies are limited, the airwaves are a shared space. When you say something over a CB, you can and will be heard by anyone within range with their radio turned on.

Some CB radios double as scanners and can deliver police, fire, and emergency services frequencies. However, you’ll want to check the frequency range and product description specs to ensure you ...