The HAO-2200/2210 are oxygen generators for in home use by middle-aged and elderly people. Breathing higher concentrations of oxygen can help combat fatigue, boost concentration, and is commonly used for treatment of mild respiratory or circulatory disorders. Designed with a focus on efficiency, ease of use, quiet operation and portability; the oxygen generators achieve a high degree of functionality and robustness. It has earned certification as a medical device, so customers can use it with confidence and peace of mind.