Specification: Model:ME83B The ME83B gas boiler thermostat is with LCD digital display screen. It is 1.5V with two sections of AA batteries. It is used to start or stop working boilers, to adjust the temperature. Thermostat detects the room temperature, when the actual room temperature is lower than the set temperature, thermostat controls boiler to start working. If the actual room temperature is higher than the set temperature, the thermostat stops the boiler operation. Characteristic: 1) Convenient to mount on the wall or put anywhere. 2) Wireless, AA battery operated, can go anywhere you want. 3) Can be set 5+2 weekly programmable. 4) Child lock to avoid misoperation. 5) Anti-freeze function. Details: 1. Working voltage: 2 x 1.5V AA battery (not included) 2. Power consumption:150uW 3. Temperature control range: 5~99, (factory setting is 5~35) 4. Temperature limit range: 5~99 5. Temperature Control Accuracy: 1 6. Size: 85x85x28mm 7. Sensor: Built-in 8. Color: White 9. Backlight: Blue or White Attention: Water heating thermostat has no outdoor sensor. Delivery: 1 x thermostat 2 * Screw 1 x User Manual (English)