Sony uses RF in the 5.15-5.35 GHz band to pair the soundbar to the subwoofer and the rear speakers. The only Bluetooth involved is if you choose to use a Bluetooth source (like a phone) to play music on the soundbar.

I used the system in a cabin with a great room that measures about 20 feet by 15 feet with fairly high ceilings (15 feet). I’m sure height effects would have been better with lower ceilings since the height speakers reflect off the ceiling. Distance to the TV from the couch was about 8 feet and distance from the couch to the rear wall where the surround speakers were mounted was about 6 feet.

The initial set-up procedure includes a basic speaker calibration using test tones and the built-in mic to optimize speaker levels for the room.