4 Chamber Sequential Compression Set (Pump + 2 Full Leg Garments + Bilateral Connector), 220V machine available, ship to worldwide, Made in U.S.A. Call for if you need bigger size. 15 sec inflation / deflation per chamber one after another / FDA 510K Medical Grade Device Approved / Overlapping Garment Adjustable pressure range 20 ~ 100 mmHg, 60 min timer, Certificate of Calibration + - 1% Accuracy F.S. / Cytotoxicity Test, Delayed Hypersensitivity / Animal Skin Irritation Test Pass (ISO 10993-, 10) / Electromagnetic Compatibility, Electrical Safety Test Pass