1. Use environment-friendly refrigerant, and the refrigeration performance is stable; 2. Dual nixie tube display, the actual temperature and the set temperature ambient temperature are clear at a glance; 3.Temperature control precision control range is small (± 0.5 °C); 4. Two temperature control modes are available to meet the selection requirements of customers' equipment in different environments; 5. With water flow alarm, ultra-high temperature and ultra-low temperature and sensor fault alarm functions; 6. it has the function of compressor overcurrent and overload protection to extend the service life of the compressor.