nest Learning Thermostat, 3rd Generation (Works with Amazon Alexa), Stainless Steel

Works with Alexa for voice control, languages: English, French, Spanish, Dutch, screen: 24-bit color LCD, 480 x 480 resolution at 229 pixel per inch (PPI), 2.08 inches (5.3 cm) diameter, compatibility: The Nest learning thermostat works with 95% of 24V heating and cooling systems, including gas, electric, forced air, heat pump, radiant, oil, hot water, solar and geothermal, heating: 1,2 and 3 stages (W1, W2, W3). Hydronic underfloor systems. cooling: 1 and 2 stages (Y1, Y2)heat pump: With auxiliary and emergency heat (O/B, aux, E), humidifier or dehumidifier (hum, dehum), fan (g), power (C, RH, RC), wireless: Wi-Fi 802.11B/G/N @ 2.4 GHz, 5 GHz, 802.15.4 @ 2.4 GHz,bluetooth low energy (BLE), remote control requirements: Wi-Fi connection with internet access, Nest app on phone or tablet with IOS 8 or later or android 4 or later, latest version of safari, chrome, Firefox or internet explorer on mac OS x V10.9 or later and windows 7 or later.