JAM Rhythm WiFi Home Audio Speaker with Amazon Alexa Voice Service, Stream Music, Built-in Intercom, Sync up to 8 Speakers for Home Audio, Control Speakers with Smartphone App, HX-W09901 Black Built-in Amazon Alexa Control. Use the JAM App to ask Alexa a question Room filling sound, 2.1 stereo sound, perfect for mid-sized rooms and syncs with multiple speakers Control all of your JAM Wi-Fi speakers from your phone using the free JAM Wi-Fi App. The App works with Spotify, iHeartRadio, TuneIn, Tidal and more Stream your favorite music or use the built in Intercom: Use the JAM App to talk through your speakers; One Touch Music: Access all your presets with the touch of a button Product dimension:8.35 x 6.30 x 7.50" Quick and easy set up: No complex wiring or expensive installation. Pair up to 8 JAM Wi-Fi Speakers for an instant home audio solution