"http://www.amazon.com/gp/product/B00834SIO0?tag=httpadvance00-20
Add to your Sonos system for amazing room-filling deep bass sound
Connects wirelessly to Sonos speakers
Works with PLAY1 PLAY3 PLAY5 PLAYBAR and CONNECTAMP
Place it anywhere in the room even lying flat under a couch
Two force-cancelling speakers positioned face-to-face offer deep sound with zero cabinet buzz
SONOS SUB Wireless Subwoofer"