Features 1Multiple Working Modes: There are multiple working modes, various wiring methods are available. Optional functions contain single wire (valve stops while the fan not stop) or dual wire (valve stops and the fan stops) 2External Embedded Installation: Adopt external embedded installation, standard 86 type installation cassette, easy to install 3Long Service Life: The thermostat contact is more than 100,000 times at and full load, and the manual operation switch is more than 60,000 times 4Stable Performance: Come with beautiful appearance, comfortable hand feeling, and stable performance. The temperature sensing component adopts an accurate metal bellows 5Various Toggle Switches: The toggle switches are power switch (ON or OFF); operation mode switch (HEAT or COOL); FAN wind speed switch (low speed 1, medium speed 2, high speed 3) Specification Item Type: Central Air Conditioning Thermostat Material: ABS Sensor: AC801 A: Inflatable Diaphragm, AC801 C: Thermistor Rated Current: 1A Constant Temperature Range: 10~30 Temperature Deviation: 1 at 25 Material And Color: Base, Cover and Pull Plate: White ABS plastic, pull switch: Hoary Relative Humidity: