The Flair Puck is flexible! At least one Puck will need to be plugged in to AC power via our Flair adapter and cable. This Puck acts as a Gateway Puck, which communicates with the Flair Cloud over Wi-Fi. Since Wi-Fi uses a lot of power, you can't have a Gateway Puck on batteries.
The rest of your Pucks can operate wirelessly with AAA batteries! They'll talk with the Gateway Puck when needed.
Please note that you cannot use other/third-party adapters and cables with Flair devices.