Med Aire Alternating Pressure Pump & Pad System provides alternating pressure for the prevention, treatment, and management of pressure ulcers. The bubble pad provides superior therapeutic treatment by alternating pressure on 130 individual bubble cells that are inflated/deflated every 5 mins, never placing too much pressure on any particular affected area. Variable pressure 4 LPM pump produces a consistent airflow, adjustable pressure and quietly alternately inflates and deflates the air cells.