Lyric Round 2.0 Wi-Fi Smart Programmable Thermostat with Geofencing, IFTTT, Works with Alexa Works with Alexa for voice control (Alexa device sold separately). Perfect for the future home - Works with Apple HomeKit(TM), Amazon Alexa, Samsung SmartThings and IFTTT Control your Smart Home with Amazon Alexa for voice control (Alexa device sold separately) and Apple HomeKit with voice control using Siri, the Apple voice assistant Feels Like" temperature function considers both humidity and temperature to maintain your comfort Adaptive recovery learns how long it takes to achieve the right temperature at the right time, with auto change from heat to cool Smart Alerts  push notifications for filter changes and extreme temperatures Minimum requirements: Youll need an 802.11 b/g/n wireless router and a smartphone or tablet with Android 4.2 and above or iOS 8.4 and above. Energy Star Certified