Description: The thermostat is for underfloor heating system with 7-day, 6-period time program control. Models are with NTC sensor to detect ambient and floor temperature and do the control compared with the setting one. Manual, time program and temporary mode can be switch any time by press the relevant keys. Double sensors function, can do both ambient and heating devices temperature sensing to power on/off the devices to make sure them working under reasonable status for more safet, reliability and energy saving. Specification and Thechnique Date:  Control type: On/off control;  Voltage: 220VAC-240VAC 50/60Hz;  Temperature limitation: 5-60 ºC (default 35 ºC);  Set point range: 5-35ºC;  Ambient: -5-50 ºC;  Ambient Humidity conditions: 5~95%RH;  Switching differential: 1-10 ºC adjustable;  Shell Material: ABS Flameproof Plastic;  Energy saving: Sleeping Function;  Switch current rating: 16A;  Power consumption: 2W;  Wiring port: ≤2.5mm⊃2;  Accuracy: ±1ºC;  Workdays time program switching: 5/6/7 workdays setting,or turn off the time program;  Sensor selection: Built-in or out or double is choiced by advanced setting;  Dimension: 86mm*86mm*13mm;     Package includes:  1 x room thermostat;  2 x screws;  1 x external sensor ;  1 x user manual;