220VAC, control boiler heating, 3A, with only internal sensor with wifi connection https://www.alibaba.com/product-detail/BHT-1000GCLW-Heater-Digital-WIFI-Room_60665190004.html?spm=a2747.manage.list.4.XP92oL The BHTseries Heating Thermostat has been developed to control electric underfloor or water heating or boiler systems. These units are designed for use in commercial, industrial, civil and domestic properties. Now you dont need to choose between saving money or staying comfortable. The wifi thermostat can help you save up energy costs every year when you use a pre-set heating program schedule through App. When you use our intuitive mobile app, you can adjust your thermostat schedule around your life, so youre not needlessly heating an empty home