Description: Myuet ME83B Smart Thermostat 7 Day Programmable Heating Controller For Gas Boiler.     Feature : Easy to install: Convenient to mount on the wall or stand on somewhere.  Freely place: Wireless , AA battery powered , can put anywhere that you want.  Programmable weekly: Can set 5+2 weekly programmable. Children lock: Children lock to avoid misoperation. Anti-freeze function: No need to worry about data storage when power is off , data can be saved automatically when power is off.    Specification: Working voltage: 2 x 1.5V AA batteries ( not included );  Power consumption: <150uW;  Temperature control range: 5~99℃ , ( factory setting is 5~35℃ );  Temperature limit range: 5~99℃;  Temperature control accuracy: ±1℃;  Dimensions: 85 x 85 x 28mm;   Sensor: Built-in;  Color: White;  Backlight: Blue;  Type 1 : light blue;  Type 2 : dark blue;     Note: The hot water thermostat does not have an external sensor.    Package Include: Gas boiler thermostat x 1;  Manual x 1