This is a Geek Squad Certified Open Box Product. See below for more information. Enjoy powerful, room-filling sound with the Sonos One SL speaker. It can pair with another Sonos One SL or One in the same room to create a spacious two-channel stereo sound. This speaker can also connect with other Sonos speakers in different rooms using a Wi-Fi network to create a spectacular multi-room audio system (additional speakers sold separately).