Includes a Play:3 speaker and the Bridge. Just connect a BRIDGE to your router using a standard Ethernet cable. Then, a simple button press will start SonosNet, a secure AES encrypted, peer-to peer wireless mesh network that enables all other Sonos products to control and play music wirelessly.The PLAY:3 uses 3 state-of the-art digital amplifiers individually coupled with 3 speakers to deliver great sound to any room. The wireless music system provides pure, clean sound that is perfect for bringing room filling music to a kitchen, bedroom, office, or just about any room in your home. A bass radiator produces powerful low notes while two mid-range drivers and one tweeter fills out the sound. www.sonos.com