The TQ family of smart thermostats are designed with Matter connectivity to make smart-home integration easy and affordable. Matter is a widely accepted standard that allows smart-home devices to communicate with the smart-speakers from Apple, Google and Amazon without having to go via the internet. The TQ1 Smart Thermostat is the easiest to use connected thermostat. It connects directly with your smart-speaker allowing local and remote control via your existing smart-home app. Use of the Matter IoT protocol means you are never locked-in to a single App, simply change your smart-speaker to change your smart-home All system configuration done at device, no app required powered by the Matter protocol. Everything works with the smart-home app already on your phone, no new accounts or apps to download Use the Apple Home, Google Home, Alexa or SmartThings App to set-up the TQ1 in seconds. A smart speaker or Matter controller is required for connectivity outside the home. C-Wire Adapter and Trim Plates sold separately System Compatibility: Conventional: Up to 2 heat, 2 cool, Heat pump: Up to 3 heat, 2 cool, PTAC: Conventional or Heat pump, Fan coil: Binary output 2-pipe or 4-pipe, Millivolt heating, Not compatible with 120V/240V line voltage systems