FeaturesFour individual bladders alternate to provide the patient a superior pressure redistribution seating surface The unique molded design, with slight abductor pommel, stabilizes the hips and keeps the patient in proper mid-line alignment The zippered non-skid stretch-knit cover is anti-microbial and fire-retardant The Chair-Air 9700C includes the Chair-Air 9701 alternating pump The portable Chair-Air AC/DC Pump allows your patient to be totally mobile A rechargeable battery backup keeps this system working up to 6 hours per charge, based on the patient's weight Air Pump dimensions 14.5L X 5W X 12.5H inch Cycle Time 10, 15, 20 Minutes Air Flow 4- 6 liters Power Source A/C 117V/60hz , D/C 12V amp/hr SpecificationsManufacturer Bluechip Medical Application Alternating Air Seat Cushion Color Black Dimensions 16 X 18 X 3-1/4 Inch Inflation Type Inflatable Material Air Cells Prop 65 No Weight Capacity 250 lbs. 1 Each / Each