Features The module equipped with a measuring sensor. You can set control mode for automatic control. High temperature start-up cooling mode: When setting start temperature value> stop temperature value, when the detected temperature ≥ start temperature, the relay is closed and the refrigeration equipment is working; when the detected temperature ≤ st Low temperature start-heating mode: When setting the starting temperature value <stop temperature value, when the detected temperature ≤ the starting temperature, the relay is closed and the heating device is working; when the detecting temperature ≥ With indicating light to indicate the working condition. Specification:Item Type:Thermostat Module Temperature Measuring Range:-9~99℃ Control Accuracy:1℃ refresh rate:0.5S Working Temperature:-10~60℃ Working Humidity:20~85% Measuring Input:NTC(3950-10K 1%)Waterproof Sensor Temperature Measuring Accuracy:1℃ Setting Range:-9~99℃ Input Voltage:DC9~15V Size:78 x 51mm / 3.07 x 2.01in Output:Relay Output,Capacity 12V10A Start indicator: The START (red) indicator is on, indicating that the relay is closed and the device is working. Stop indicator: STOP (green) indicator is on, indicating that the relay is disconnected and the device stops working. Digital tube: The middle red digital tube shows the current detected temperature, the left green digital tube is the set start temperature, and the right green digital tube is the set stop temperature. Button: START "△▽" sets the starting temperature; STOP "△▽" sets the stop temperature Package List:1 x Thermostat Module1 x Measuring Sensor Package List 1 x Thermostat Module 1 x Measuring Sensor