Breez Plus comes with a 5V power adapter and a usb cable or can be powered through wired connection options of 24V or 12V (e.g. from your existing thermostat wiring or using a 12V or 24V transformer).
MOST IMPORTANT: Use only one source to power up your Breez Plus i.e. either 5V adapter or 24V/12V hard wired. Do not use both sources as this may cause problems.