... 2,High quality ang long life 3,Cheap Temperature controller Main Function1,Temperature display, temperature controlling2,(refrigeration/heat mode),3,compressor start ... ),6,2 defrost end mode (timing, controlled by both temperature and time),7, dripping, 8,manual defrost,9,sensor ... 50Hz (Refer to the wiring diagram)3,Operating environment: temperature -30°C~80°C, humidity≤85%4,Relay contact capability ...