Safe and Reliable: Polycarbonate frame with white backlit LCD display. Internal NTC sensor and robust buttons. Precise and stable circuit design, long service life. For gas boilers. Smart Control wifi thermostat: You can free download "beokhome" app from GooglePlay/AppStore. Control the heating remotely via your smartphone or directly via the thermostat. Scan the QR Code on the manual and get the manual in Italian, Spanish, German, French and Russian. Multi - performance: 0.5c distribution; Adjustable between 5 and 35c; Other functions: manual mode in programming mode; Temperature calibration; Power-off memory function, child lock, anti-freezing function, high temperature protection, start temperature difference, etc.