[Do a Simple Check]Please scan the QR code to do a check if _Mega Brand thermostat is compatible with your home before purchase. A common wire (C-wire) is required for all _Mega Brand thermostat [Compatibility]The smart thermostats for home is compatible with 90% of system(24V AC System): Conventional (2H/2C)-Gas, Oil, Electric, Boiler; Heat Pump(2 stages Heat/Cool + 2 stages Aux/Emerg.); Heat or Cool only Systems [Remotely Control & Voice Control]Control and monitor the programmable thermostat from anywhere using _Mega Brand Thermostat App or Smart Life App; Compatible with Alexa and Google Home for hands-free voice control [Live Smart & Energy Saving]7 days programmable schedules with Auto Home/Away mode, the ac thermostats for home automatically adjust room's temperature, keep your home in a comfortable temperature when you arrive, meanwhile helps you save much on HVAC expense [Multi Practical Functions]Features temperature alerts, filter change reminders, automatic synchronize time