Features and digital temperature controller with LED display for temperature control and monitoring. Versatile thermostat with the option to select cooling or heating working mode, providing flexibility for different temperature control needs. Set upper and lower limit temperatures to prevent accidents and ensure safe and reliable . Automatic start function for cooling or heating maintains a constant temperature, enhancing efficiency and convenience. Temperature calibration feature allows for adjustment according to specific temperature requirements, ensuring accurate control. Features: 1、 and . 2、Can select cooling or heating working mode. 3、Set highest/ lowest upper limit temp to avoid accident. 4、Automatically start cooling or heating for constant temperature. 5、Temperature calibration, you can calibrate temp according to requirement. Specification: Features: and . Can select cooling or heating working mode. Set highest/ lowest upper limit temp to avoid accident. Automatically start cooling or heating for constant temperature. Temperature calibration, you can calibrate temp according to requirement. High temp alarm, when measure temp reach to the setting temp, controller will alarm. Specification: Material: electronic element Voltage:DC 12V/24V /110-220V(Optional) Power:120/240/1500W (Optional) Weight: Approx.48g/1.7oz Package list: 1 x Digital Thermostat Temperature Alarm Controller Sensor Circuit connection: refer to the circuit diagram to connect the power supply and load. At this time, the digital tube (top) displays the actual measured temperature value, and the digital tube (bottom) displays the preset temperature. If the temperature sensor is missing or damaged, the digital tube will display "-- --", and the buyer must check whether the temperature sensor is installed before using it. The temperature control output is a 10A relay, which can meet various high-power loads. Please make sure the circuit is correct. Indicator light, digital tube status: Indicator light: off means the relay is disconnected, and on means the relay is closed Digital tube: display "-- --", 1. Check whether the temperature sensor is missing or damaged 2. High temperature protection of heating mode 3. Low temperature protection in refrigeration mode The relay in protection mode is automatically disconnected. Use of keys: the thermostat pan Package List