Trueplay tuning technology optimizes sound based on acoustics around. Compact and understated design blends into your home. Plug Ray into TV with optical port. Play music from Apple AirPlay 2 Spotify Connect and more. Night Sound reduces intensity of loud effects. Use Sonos app to adjust EQ and control. 4 Amplifiers 2 Tweeters 2 Midwoofers. Bass Reflex System. WiFi connectivity. Optical port. Ethernet port. Infrared (IR) receiver.