Features: * brand new and high quality *Made of high quality material, durable and practical to use *SMART WIFI APP CONTROL: Control the device to start/stop for keep the house at a comfortable temperature range by the mobile app before you come back home. *Save the energy: 5+1+1 6 periods programmable(can be set different time and temp for each period) makes it works automatically mazimize comfort ane economy *LCD Touch-Screen with Backlight: you can do it Directly through the finger and its easy to read ,even in the dark. *Support to be voice control by Alexa. Model Distinguish: GA: Water floor heating to control NO NC actuator or the electromagnetic valve with WiFi function, Voice control, 3A. GB: Electric floor heating with WiFi function, Voice control, 16A. GC: Water/gas boiler with WiFi function, Voice control, 3A. Specifications: Power Supply: 95 ~ 240VAC, 50 ~60Hz Set Temp. Range: 5-60degree Celsius (max 95degree Celsius) Limite Temp. Range: 60degree Celsius (factory setting 35degree Celsius) Accuracy: 0.5degree Celsius Sensor: NTC Power Consumption: < 1.5W Timing Error: