WHAT DOES BLUETOOTH SPEAKER WITH MICROPHONE SM MEAN?

This is a smart speaker that connects with Wi-Fi, Bluetooth and Apple AirPlay. You'll be able to pair the Transfer 2 with other Sonos speakers in your home to produce a broader sound system. Plus You should use the Sonos line-in adapter (marketed separately) to connect it to other audio resources like turntables, making it more flexible than our ot