Med Aire Alternating Pressure Pump and Pad System with Various Pump Options and Pad Styles , Pad Style: Standard Pump Style: Fixed Pressure Pump130 individual bubble cells for maximum comfort and effectiveness. Quiet pump technology alternately inflates and deflates the pads air cells. 4 LPM (Liters per Minute) pump produces consistent air flow and pressure. 5-Minute cycle time. Easy to change filter. Bubble pad design provides superior therapeutic treatment. Built in bracket for mounting easily to bed. Pad is made of long lasting durable heavy gauge premium vinyl. 1 Year Warranty on the pump. 90 day Warranty on mattress. Size: 78“ x 34Weight Capacity: 300lbsUnit of Measure: 1/csProduct photo may not exactly match the product offered for sale. Please refer to the product description.