Tado Smart Air Conditioner and Heater Controller, Wi-Fi,  Compatible with iOS and Android, Works with Alexa Works with Alexa for voice control (Alexa device sold separately). Connects your smartphone to your air conditioner or heat pump and turns it into a smart device. Experience a new level of comfort with automatic location-based AC control. Control your AC from anywhere with the tado app: Turn it on and off or change the settings in the app from anywhere, at any time. Power supply: AC 120 / 240 Volts, 5 Volts USB power supply. Saves up to 40% on your AC energy costs. tado can pay for itself in less than a year. The app gives you instant access to reports showing temperature and cooling activity as well as savings. Smart Home Integration: Control your AC with your voice, using Amazon Alexa or Google Assistant, or bring products and web services together to create new scenarios with IFTTT. Free app for iOS, Android, and Windows The Smart AC Control works with all air conditioners with a remote control that displays the air conditioners current settings (for example mode, target temperature and fan speed).