Wireless room thermostat can control the equipment or floor heating systemby wireless.Alarm display when the room temperature is lower than 0 Celsius or higher than 45 Celsius. Features 1) Heating / cooling control; 2) Easy operation and intuitive display; 3) Backlight display (for 220V); 4) Delay-time On / Off function; 5) The temperature difference between off and on is adjustable 6) Allowable to calibrate the temperature display; 7) Allowable to connect the external temperature sensor (Optional: NTC 100K). Outdoor temperature display provided. 8) Display adjustable between room temperature, outdoor temperature and preset temperature. 9) Display adjustable between Cand F. 10) Antifreeze when turn off. 11) Allowable to set the highest temperature of heating and the lowest temperature of cooling. 12) Wireless transmission. 13) Allowedto install in standard 86 box 14) Multiple fault detection and display functions. Parameter