Features: 1 Easy to install on the wall or stand anywhere. 2 Wireless powered by AA batteries can be placed anywhere. 3 You can set 5 + 2 programmable weekly. 4 Child lock to avoid misoperation. 5 Antifreeze function. 6Features: 7The gas boiler thermostat has an LCD digital display. 8It is powered by two AA batteries 1.5V. 9It is used to start or stop the boiler to adjust the temperature. The thermostat detects the room temperature and when the actual room temperature is lower than the set temperature the thermostat controls the boiler at the beginning of work. 10When the actual room temperature is higher than the temperature you set the thermostat will control the boiler to stop working. Specification: Material: ABSSize: 85x85x28mmSensor: built-inColor: WhiteBacklight: blue or orangePower consumption: <170uWTemperature control range: 5~99 (factory setting is 5~35)Temperature limit range: 5~99Temperature control accuracy: 1 Package List: 1 x thermostat2 x mounting screws1 x English manual