Yes, the C-wire powers the thermostat.
Wyze Thermostat requires a C-wire, or "common" wire, for power.
Don't have a C-wire? We've included a C-wire adapter in the box. Wyze Thermostat does not use batteries.
Happy Holidays 2023! The holidays are upon us, and you may experience longer than usual wait times. Our support team appreciates your patience while we work through this busy holiday season! ❄️