[3-UNIT SET FOR MULTI-ZONE HEATING] This set contains 1 thermostat for water-based underfloor heating, 1 for electric heating and 1 for gas boilers so you can control separate zones with a single app account. [GROUP CONTROL FOR FAMILY SCENARIOS] Smart group control links rooms so you can create heating scenes (away, sleep, comfort) and control them via WiFi for synchronized temperature across multiple spaces. [ENERGY SAVING TEMPERATURE TRIGGER] Thermostat activates heating when room temperature falls about 1°C below your set point, reducing unnecessary runtime while maintaining a cozy environment. [PRECISE SENSOR & ELECTRICAL RANGE] Thermistor-based sensing keeps temperature control within 5°C accuracy; designed for AC180-260V systems and compatible with water floor heating, electric wall mounted boilers and gas boilers.