The Lyric T5 is fully compatible with Apple HomeKit and other ecosystems. Uses geofencing technology to keep track of your smart phone's location. So it knows when you're on your way home and makes sure your home is exactly how you like it when you arrive. Lyric is a Wi-Fi connected platform designed to simplify your home comfort with a single app. Control from anywhere by smartphone or tablet (Android/AppleiOS). Intelligent comfort control allows Lyric to automatically determine if your home needs heating or cooling to provide maximum comfort. Push notifications remind you to change your filter and warn you of extreme indoor temperatures. Touchscreen display, back-lit and easy to use. 4.0625"W x 4.0625"H x 1.0625"D.