No C Wire Options
Compare no-C-wire smart thermostats by power method: included adapters and extenders, battery power, and the line-voltage systems to rule out.
LINJO HEIYECHADENG-42 Black Voice Control with Alexa and Google Assistant
Honeywell Home RTH9600WF2022 Smart Color Thermostat
Smart Humidifier and Air Circulator Fan Bundle Precise humidity control via app or voice
WiFi Smart Thermostat Temperature Controller WiFi smartphone app remote control
Dreo DR-HPF007S Starlight Smart Fan with Position-based Oscillation
ecobee SmartThermostat with Voice Control Redesigned and reengineered