Fangrui Product Details Wifi Smart Thermostat,wireless Remote Control,timer Function:weekly Programmable Voice Control:voice Control Via And Assistant Frost Protection:with Frost Protection Turned On, When The Temperature Drops Below 5c, The Thermostat Automatically Starts Heating To Keep Your Home Warm. Customize Backlight As Desired Child Lock:in Order To Avoid The Danger Or Waste Of Electricity Caused By Children Touching The Switch By Mistake, Add A Security . Temperature Calibration:in Case Of The Temperature Variation Between The Floor And The Air, You Can Set The Calibration Value By App, To Make Sure The Final Temperature Reaches Your Value. Suitable For Various Hidden Box:compatible With Standard 86mm Square Cassettes And 60mm European Cassettes To Meet All Installation Environments. Share Device:share Controls With Your Family To Manage Your Smart Home And Protect Your Warm Home. Supply Voltage: Ac100-240v; 50/60hz Power Consumption: 1w Max (wi-fi Version 1.5w Max) Temperature Setting Range: 5-95external