Features: brand new and high quality Product adopts industrial-grade chip, high-precision SHT30 temperature and humidity sensor. High precision digital display word double output automatic constant temperature and humidity control panel. Standard 35mm rail installation, small and exquite appearance, can be directly intsalled on DIN35 rail. Made of high quality ABS, durable and have a long for time service. Adopting imported SHT30 Temperature and humidity sensor, better work performance. Specifications: Material: ABS Size: 19cm/7.5 inch Functions are mainly classified into two categories: temperature function, humidity function; Temperature functions are as follows: 1. Automatic recognition of working mode: The system automatically identifies the working mode according to the start temperature/stop temperature; Start temperature > stop temperature, refrigeration mode 'C'; Start temperature < stop temperature, heating mode 'H'; 2. Refrigeration mode When the detection temperature is greater than the starting temperature, the relay is on, the red indicator light is on, and the refrigeration equipment starts to work; When the detection temperature is less than the stop temperature, the relay is off, the red indicator light is off, the refrigeration equipment stops working; 3. Heating mode: When the detection temperature is less than the starting temperature, the relay is on, the red indicator light is on, and the heating equipment starts to work; When the detection temperature is greater than the stop temperature, the relay will be turned off, the red indicator light will be off, and the heating equipment will stop working Temperature correction function OFE(-10.0 ~ 10.0) : The system works for a long for time, there may be deviation, through this function correction, the actual temperature = measured temperature + calibration value. Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Temperature & Humidity Controller