... display,EL Backlight b)Adjustable 4-speed or automatic fan speed control,High,Medium,Low and Auto. c)Adopt monolithic,high immunity ... display,EL Backlight b)Adjustable 4-speed or automatic fan speed control,High,Medium,Low and Auto. c)Adopt monolithic,high immunity ... System.ApplicableApplication to HAVC,Heating System,Fire Place,Fan Coil Unit,Motorized Valve,Actuator and Intelligent Building etc.. ...