130 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. Manufacturers1 Year Warranty on the pump. Manufacturers 90 day Warranty on mattress. Pad size: 34" x 78" x 2.5". Weight capacity 300 lbs.