Auto control the work of compressor, motor fan of condenser and drain valve , detect 2 channels of alarm signal. It's design for refrigerated air dryer, need pressure of condenser to control the work of motor fan of condenser.Function:Set3 buttonsDisplay3 bit 0.56 inch LEDs and 5 pcs of LED lights to show work status and alarm information.ControlControl the work of compressor, detect and display ...