Smart thermostat provides uniform and comfortable temperature control throughtout every room in your property. With technology,craftsmanship and quality materials to offer you a safe, reliable thermostat combined with sleek, contemporary design.Note:GA is for water heating;GB is for electric heating;GC is for water/gas boiler;Electric heating has external sensor , Water heating and Gas boiler heating without external sensorThere are two types of this product with WiFi and no WiFi, please purchase according to your needsFeatures:4.8'' large colorful backlight LCD for easy reading, touch screen to make simple operation.Amazing silver frame opens your modern life, the visible thickness above the wall is only 15mm.86mm hidden box and European 60mm round box is suitable.1 accuracy keeps temperature within the level you set. or can be customized.5+1+1 six periods programmable maximize comfort and economy, manual or programmable mode switchable.Data memory when power is off, no need to worry about power failure.Press and hold the buttons for 5s to lock/ unlock the thermostat, you can select full lock or half lock.Specifications:Material: PC + ABSColor: Black / White / Silver (Optional)Type: Wifi/ Non-wifi (Optional)Voltage: AC 95-240V 50-60HzCurrent Load: 5A(GA/GC),16A(GB)Power Consumption: <1.5WSensor: NTC3950, 10KAccuracy: 1 or 1Set Temp. Range: 5-35Display Temp. Range: 5-99Ambient Temp.: 0-45Ambient Humidity: 5-95%RH (Non Condensing)Storage Temp.: -5~45Timing Error: <1%Installation Box: 86 * 86mm Square or European 60mm Round BoxWire Terminals: Wire 2 * 1.5mm2 or 1 * 2.5mm2Protection Class: IP20Item Size: 12.7 * 4.0 * 8.8cm / 5 * 1.57 * 3.46inItem Weight:about 236g / 8.31oz(GA),242g / 8.52oz(GB), 231g / 8.14oz(GC)Package Size: 16.5 * 12.5 * 5.8cm / 6.50 * 4.92 * 2.28inProduct features C od e Func tio n S e tti n g an d o p tio n s D efau lt 1 Temperature compensation -9 to 9 -3 2 Deadzone Temp 1-5 01 3 Time Display O:12h 01:24h 01 4 Button Locking 00:All buttons are locked except power button 01:All buttons are locked 01 5 Sensor types In:Internal Sensor(to control or limit the temp.) Ou:Only external Sensor(to control or limit the temp.) AL:Internal/External Sensor (Internal sensor to control the temp., external sensor to limit the temp.) AL 6 Min.Set Temp 5-15 5 7 Max.Set Temp 5-45 35 8 Standby Brightness 0-30 4 9 Energy saving Mode 00:Energy saving Mode 01:Non-energy saving Mode 00 A Energy saving Temp 25-70 20 B High temperature protection setting 0-10 45 C Low temperature protection setting 3-99 0 Package List:1 * Thermostat2 * Screws1 * Manual (English)1 * Floor Sensor(Note: only GB has, GA/GC does not)GA is for water heating 5A1.Display air temperature, ultraviolet intensity and humidity, and expand multiple functions.2. lt can control air conditioning and heating equipment.3.WiFi system can be equipped.4.12 interfaces with other systems.GB is for electric heating 16A1.Display air temperature, ultraviolet intensity and humidity, and expand multiple functions.2. Support device sharing.3.WiFi system can be equipped.4.12 interfaces with other systems.GC is for water/gas boiler 5A1.Display air temperature, ultraviolet intensity and humidity, and expand multiple functions.2. Support device sharing.3.WiFi system can be equipped.4.12 interfaces with other systems.The thermostat has a large size colorful backlit LCDEasy to read, and a touch screen makes operation simple.5 + 1 + 1 six cycles are programmable to maximize comfort,and can be switched between manual and programmable modes.Press an