Gradient sequential compression system: most firm at the bottom (foot) and gradually reduces toward the top of the garment like human body. (appx -7 % each chamber pressure). Pneumatic Sequential Lymphadema Pump * Our system prevents blood and lymph fluid from reversing to leg or arm during inflation time. Gradient Sequential 4 Chamber Compression Therapy. Safety & Lock system. Easy to transport. Cycle Time 60 sec / Inflation Time 36 sec (9 sec each chamber) Deflation Time 24 sec. Pressure Adjustable from 20 mmHg to 100 mmHg. Timer: 0 to 60 min or Continuous Mode. Comes with power cord. 12 L x 8 W x 5.5 H * Weight 5 lbs * 1 year warranty * HCPC E0651