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Alternating pressure relief system is specifically designed for the treatment of stage I and II pressure sores, and for prevention. Air pump cycles varying pressures over a period of 8 or nine minutes through cells of vinyl mattress for relief of pressure points. Control knob adjusts comfort range in 8 levels. Features patented air compressor chamber with ultra-quiet operation, external air filter intake, and securing straps on the mattress. Latex-free. Specifications: Pressure Range: 50 - 105 mmHg Cycle Time at 60 Hz: 8 min Cycle Time at 50 Hz: 9.6 min Pump Dimensions: 9.8" x 5.3" x 3.7" Mattress Dimensions: 78" x 34" x 2.5", inflated Mattress Weight: 4 lb Pump Weight: 4 lb Weight Capacity 220 lb
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