The Dynarex Resp-02 Oxygen Concentrator is a convenient, top-grade medical device that helps relieve respiratory difficulties for patients with breathing problems. You'll love the quiet operation and user-friendliness of this durable, reliable machine. Designed for use with a nasal cannula, this premium concentrator weighs only 37 pounds and is easily transportable with four smooth rolling casters and easy-grip top handle. Perfect for use at home and a wide range of medical settings including clinics, long-term care, rehab facilities, and much more. Patient controls are easily accessible so adjusting oxygen flow rates is a breeze. Audible and visual alarms and manual reset button help to ensure consistent operation and optimal safety.