Feature:1. Multiple 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)2. External Embedded Installation: Adopt external embedded installation, standard 86 type installation cassette, easy to install3. Long Service Life: The thermostat contact is more than 100,000 times at 220V and full load, and the manual operation switch is more than 60,000 times4. Stable Performance: Come with beautiful appearance, comfortable hand feeling, and stable performance. The temperature sensing component adopts an accurate metal bellows5. Various 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 ThermostatMaterial: ABSSensor: AC801 A: Inflatable Diaphragm, AC801 C: ThermistorVoltage: 110-220V/AC, 50/60HzRated Current: 1AConstant Temperature Range: 10~30℃Temperature Deviation: ≤1℃ at 25℃Material And Color: Base, Cover and Pull Plate: White ABS plastic, pull switch: HoaryRelative Humidity: <92% (no condensation)Application: Used in commercial and civil buildings. Can control the central air conditioning terminal coil motor and water valve for heating and cooling. The measured temperature is compared with the set temperature by the logic circuit. When the relative temperature difference is greater than 1℃, the fan or electric valve is automatically started, and when the ambient temperature reaches the set temperature, the fan or electric valve is automatically closed..Package List:1 x Thermostat2 x Screw1 x User ManualNote:Environmental Conditions: ‑20℃～55℃