A radio transmitter is a device that sends out radio waves to communicate information over distances. It converts electrical signals into radio frequency signals, which can then be picked up by a radio receiver. These transmitters are essential for various applications, including broadcasting music, news, and emergency alerts. Radio transmitters come in different types and power levels, depending on their purpose. For example, AM and FM transmitters are used for radio stations, while cellular transmitters facilitate mobile phone communication. The effectiveness of a transmitter is influenced by factors like frequency, power output, and antenna design.