The thermostat requires a C wire for power.Broad Compatibility: Works with 95% of heating and cooling systems, including single or multi-stage furnaces, boilers, air conditioners, heat pumps (with or without AUX heating), and fan coil units.User-Friendly: With a sleek glass panel and minimalist design, adjusting the temperature is as easy as a touch or using the Meross app from anywhere. The smart thermostat integrates with Apple Home, Siri, Amazon Alexa, Google Assistant, and SmartThings thanks to Matter technology.Smart Schedule: Save energy costs with a 7x24-hour smart schedule that ensures comfort when you're home and saves energy when you're away.Save on Energy Bills: Keep track of your heating and cooling usage with the Meross app to conserve resources.