SONOS is a technology innovation company from America. The full name of SONOS is SONOS wireless HiFi system, which brings the fun of wireless HiFi music from the cloud and a revolutionary way of music experience. No matter the music stored in personal favorites, or hundreds of thousands of free Internet radio stations and online music, wireless control can be realized by using roaming remote control, Android smart phone, iphone/ipad, PC or Mac. Simple installation, no need for additional wiring when expanding. You can use the universal music player Play: 3 or Play: 5 alone, or connect the connector CONNECT/CONNECT:AMP to your original home theater. Any combination can play the same song in each room or play different songs in different rooms. Wireless HiFi music in the cloud has since taken over.