[MULTIPLE WORKING MODES] Our central air conditioning thermostats have a variety of working modes and a variety of wiring methods to choose from. Optional functions include single line (valve stop, fan not stop) or double line (valve stop, fan stop), you can choose to use it yourself. [STABLE PERFORMANCE] Our central air conditioning thermostats use sophisticated metal diaphragms, which are beautiful in appearance, comfortable in hand, and stable in performance. The thermostat contacts are at 220V, more than 100,000 times at full load, and manually operated switches are more than 60,000 times, which can serve you for a long time. [EASY TO INSTALL] Our central air conditioning thermostats adopt external embedded installation, standard 86 type installation card box, easy to install. Our package includes screws and instructions. You can refer to the instructions for installation and save your precious time. [WIDE APPLICATION] It can control the central air-conditioning terminal coil motor and water valve for heating and cooling. The logic circuit compares the measured temperature with the set temperature. Our central air-conditioning thermostats are used in commercial and civil buildings. Quantity issued: 1