Main functions: fully-automatic control, cool, heating, ventilation, fresh air, air-flow direction, memory, error alarm, voltage auto-protection, demisting, evaporator fan PWM 7-grade adjustment, LCD display ,attractive appearance. The shift function 1) Running time check 2) Defrost temp. display (press fresh air button for no less than 3S) 3) Hold cooling (press cooling button for no less than 3S) Application YUXIN Automotive Air Conditioner, LIUGONG Machinery, XGM Machinery, JINGONG Machinery, KOBELCO.