The Span America-5500 Control Unit is the specialized digital pump designed to power the PressureGuard APM therapeutic mattress series. It provides high-efficiency alternating pressure and powered flotation therapies to treat and prevent Stage I-IV pressure injuries. Unlike loud, high-heat blowers, this unit operates with minimal noise and heat generation while consuming very little power. Its user-friendly interface allows for precise comfort adjustments, and the system is designed to maintain mattress integrity even during patient transport.