CB radio, or Citizens Band radio, is a two-way radio system that allows individuals to communicate over short distances. It operates on 40 channels within the 27 MHz band and does not require a license for personal use. CB radios are popular among truck drivers, outdoor enthusiasts, and hobbyists for their ability to provide real-time communication. Users can transmit voice messages, and some models also support data transmission. CB radios are often used for coordinating travel, sharing information about road conditions, and emergency communication. They are a simple and effective way to stay connected without relying on mobile phones.