Features Two force-cancelling Subwoofer drivers positioned face-to-face For deeper, richer sound and zero cabinet buzz or rattle. Two perfectly tuned Class-D digital amplifiers For deep, bottomless sounds that let you hear and feel every chord, kick, splash and roll. Compatible with all Sonos amplified components Works with Connect Amp, Play:5, Play:3, Play:1 speakers and Playbar (all sold separately) to complete your audio experience. Voice control Works with Amazon Alexa. Wireless design Makes it easy to place the Subwoofer in an area that suits your sonic needs and preferences and connect to your Sonos system through your home Wi-Fi network. Wireless streaming lets you access all the music you love in one place Enjoy your music library, radio stations and online services through a single app. Compatible with Apple Music Gain access to over 30 million songs and let experts handpick music you'll love based on what you listen to. Control your music from the palm of your hand Download the free Sonos Controller app on your compatible smartphone, tablet, PC or Mac to search for songs and stations, choose music and control the volume. One-button setup Press a button, follow simple prompts on the Controller app and enjoy the Sonos Subwoofer. Additional ports Ethernet input for wired connection.