Voice enabled with Sonos Voice Control and Amazon Alexa. WiFi and Bluetooth connectivity. Line-in connects a turntable computer or other audio source with auxiliary cable. Intuitive touch controls. Trueplay tuning technology analyzes acoustics of the space and optimizes EQ. Apple AirPlay 2. Sonos app adjusts EQ and controls from any room. 3 Amplifiers 2 Tweeters 1 Woofer.