Recently my doctor placed a prescription for an oxygen concentrator for my home and a portable unit… the portable unit had to be ordered ( min 30 plus days ) I told them I did not want or need the home unit, never picked it up. Customer service is terrible and very poor use of the English language. This company should not be in the healthcare industry. Unfortunately they seem to have a very large following within the medical community. ( not sure why) they lie, there service is terrible, Medicare should investigate this company and there billing issues. Criminal !!