Features The module equipped with a measurement sensor. You can set the control mode for automatic control. High temperature start cooling mode: When setting the start temperature value > stop temperature value, when the detected temperature ≥ start temperature, the relay is closed and the refrigeration equipment works; when the detected temperature ≤ st Low temperature start-heating mode: when setting the start temperature value With indicator light to indicate working status. Specification: Item Type: Thermostat Module Temperature measurement range: -9 ~ 99 ℃ Control accuracy: 1℃ refresh rate: 0.5S Operating temperature: -10 ~ 60 ℃ Operating humidity: 20 ~ 85% Measuring input: NTC (3950-10K 1%) Waterproof sensor Temperature measurement accuracy: 1℃ Setting range: -9 ~ 99 ℃ Input voltage: DC9 ~ 15V Size: 78 x 51 mm/3.07 x 2.01 inch Output: relay output, capacity 12V10A Start indicator: The start indicator (red) is on, indicating that the relay is closed and the device is working. Stop indicator: The STOP indicator (green) is on, indicating that the relay is disconnected and the device stops working. Button: START “△▽” sets the start temperature; STOP “△▽” sets the stop temperature Presentation of the mode: High temperature start cooling mode: When setting the start temperature value > stop temperature value, when the detection temperature ≥ start temperature, the relay is closed, the refrigeration equipment works; When the detection temperature ≤ stop temperature, the relay is disconnected and the refrigeration equipment stops working. For example: set the start temperature to 30°C, the stop temperature is 25°C, when the detected temperature value ≥30°C, the relay is closed, the start indicator light (red) is on; when the detected temperature value is ≤25°C, the relay is off, shutdown indication. The indicator light (green) is on. Package List 1 x Thermostat Module 1 x Measuring Sensor