This is a cold therapy product specially designed for home postoperative rehabilitation after knee surgery.The device pumps water around through the knee wrap providing continuous cold therapy to your knee. It's very easy to use; simply drop the pump into a bucket full of cold water and ice. 1. Colder, the ice pack is closer to the skin, and the cold feeling is stronger, which meets the requirements of patients after orthopedic surgery. 2. Smaller + lighter. This product is currently the smallest and lightest cold therapy product on the market and also much more economical. 3. Cheaper. Small size and few accessories making it easy to use. 4. Easy to carry and use, easy to operate. FeaturesSnug FitSafe Material3 Adjustable SpeedsLow NoisePortable for on the GoBucket not included. This system includes the knee wrap and pump but you will need a bucket or bag to put the ice cold water into that the pump can sit into. ContraindicationsDo NOT use the product before consulting a doctor if any of the followingcondition applies:1. Patients with Raynaud disease.2. Acute, unstable (untreated) fracture.3. Who have rheumatoid arthritis in the affected region.4. Who have open wounds, or localized unstable skin condition.5. Who are intolerant to cold compress or have cold hypersensitivity6. The pregnant, patients with hypertension, extreme low blood pressureor circulation disorders.7. Who have vascular diseases such as prior frostbite, diabetes,arteriosclerosis or ischemia.8. Who have hematological dyscrasias which affect thrombosis such asparoxysmal cold hemoglobinuria, cr yoglobulinemia, sickle-cell diseaseor serum cold agglutinins.9. Who are in the acute stages of inflammatory phlebitis in the affectedregion.