Its state-of-art assembling techniques, is fully capable of producing multi-stage high power and large temperature difference Thermoelectric Cooling (TEC) modules. The cooling output of the module may reach tens of watts and its temperature difference is more than 90. Hui Mao is capable of supplying this kind of cooling module in large quantities. The success of the multi-stage TEC modules brings hope in developing a whole new generation of electric cooling refrigerator, wine cooler and air cooler. Our multi-stage thermoelectric cooling modules also can be used for cooling infrared photodetectors, deep chilling systems, X-ray detectors, etc.