The new Sonos One Smart Speaker has Amazon Alexa built right in for the ultimate hands-free control of your music. You can use your voice to select songs, turn up the volume, and more--all while you're doing other things. You'll get all of Alexa's best features, like checking news and traffic and managing smart devices using a single Sonos speaker. When you're ready to expand your Home Sound System sound system, you can wirelessly connect your Sonos One to additional Sonos speakers for complete multi-room listening.