Sirius XM Radio is a satellite radio service in the United States that offers a wide variety of music, talk shows, news, and sports programming. Launched in 2008 after the merger of Sirius and XM Satellite Radio, it provides listeners with access to hundreds of channels, including commercial-free music and exclusive content from popular personalities. Subscribers can listen to Sirius XM Radio through various devices, including car radios, smartphones, and home audio systems. The service offers both online streaming and traditional satellite broadcasting, allowing users to enjoy their favorite shows and music anytime, anywhere.