With the SONOS CONNECT, you can add any HiFi system to the SONOS multi-room system. This lets you send music wirelessly to the speakers via WiFi. Listen to music from your mobile device or access internet radio and streaming services. Because you're adding the speakers to the SONOS multi-room system, you can control them with the SONOS app. Distribute various speakers all over your house and play the same music in every room. If you walk from your living room to the bedroom, you won't miss a second of your favorite song. You connect the CONNECT to your device with an RCA or optical cable.