The Digital Control Gauge contains three major components of the air machine. Inside the plastic housing of the Digital Control Gauge is the electronic board, the LCD display screen, the keypad, the solenoid valve, the buzzer, the step down transformer as well as all the respective wiring. The Digital Control Gauge includes a rubber gasket attached to the front of the housing for protection. Upon request, the Digital Control Gauge can be programmed to the desired settings. Compatible with SC05-SS, SC09-SS, SC12-SS & WM-SS