ECB-6020 IS SPECIALLY DESGONED FOR REFRIGERATING UNIT.DOUBLE-SCREEN DISPLAY WITH BOTH THE CURRENT TEMPERATURE AND SETTING TEMPERATURE:MEARSURING TEMPERATURE BY DOUBLE SENSORS;MANGE AND CONTROL COMPRESSOR AND DEFROSTER SEPARATELY;AUTO AND MANUAL CONTROL OPTIONAL:DEFROSTING OVER TEMPERATURE PROTECTION,CRANK HEATING;WHEN SENSOR ERROR,COMPRESSOR TURNS ON/OFF WITH PROPORTIONAL TIME;EASY OPERATION AND VISUAL DISPLAY STABLE AND RELIABLE PERFORMANCE.