The thermostat detects the room temperature. When the actual room temperature is lower than the set temperature, the thermostat controls the boiler to start working. When the actual room temperature is higher than the set temperature, the thermostat controls the boiler to stop working. Features: Manual or automatic mode free to choose. Automatic temperature acquisition with one degree accuracy. Weekly programmable thermostat supports different temperature settings for six time modes per day. Keypad lock function is designed to prevent children from misuse. Suitable for gas boiler and heating. For home, office, shopping mall, hotel. Adopts an LCD digital display. Parameter: Model: ME83 Name: Gas boiler thermostat Temperature sensor: NTC thermistor Temperature Accuracy: One degree Temperature Setting: 5-90 Product Size: 86 by 86 by 30mm Display: LCD screen Frame color: white Backlight Color: White, Blue, Orange Button: Touch button Material: Flame retardant PC and ABS Additional function: Weekly programming and power-off memory Current: 3A Voltage: Two 1.5V batteries (not included) Protection level and shell material: IP20 and flame retardant PC Package Includes: Smart Thermostat Manual