Shortwave radio refers to a specific range of radio frequencies, typically from 3 to 30 megahertz (MHz). It is capable of transmitting signals over long distances, often beyond the horizon, by reflecting off the ionosphere. This makes it popular for international broadcasting and communication, especially in remote areas. Shortwave radio is used by various organizations, including amateur radio operators, government agencies, and international broadcasters. It allows users to receive broadcasts from around the world, making it a valuable tool for news, information, and cultural exchange. Additionally, it can be used for emergency communication when other systems fail.