1Main Function: The maximum temperature controller range of this thermostat is 1 to 40, and the start and stop temperatures can be set to control the heating equipment. 2Applicable Equipments: This thermostat can be used for temperature control of wall mounted boiler and gas boiler. 3Microcomputer Control Technology: By comparing with the set temperature, start and stop of heating equipment are controlled by relay to achieve constant temperature and energy conservation. 4LCD Display: Comes with a large LCD display, you can easily see and monitor the running statues of the thermostat. 5Small Size: This thermostat is small in size, easy to install, beautiful and generous, and will complement your furniture. Item Type: Digital Temperature Controller Material: Flame Retardant PC Power Supply Mode: 2 x AA batteries (delivered without batteries) Display Accuracy: 0.5 Probe Sensor: NTC (10k) 1% Contact Capacity: The greater the working voltage of 30-230VDC, the smaller the current. Take 5A 30V (HF relay) or 2A 30V (NEC relay) as reference Temperature Display Range (limit temperature control range): 1 to 40 Default Temperature Regulation Range: 5 to 35 Operating Temperature Range: 0 to 50 Running Program: Set once a week Output: Switch relay 1 x Digital Temperature Controller 2 x Screw