Oxygen concentrator price is generally how much money a?

On the market at present, the price of oxygen concentrator, from the cheap more than a thousand to the expensive seven or eight thousand have, on the whole, or depends on different needs. If you have an elderly person with respiratory disease or cardiovascular disease, it is necessary to have a 3-liter oxygen concentrator. I bought my own Omron, three thousand dollars or so, but also one of the few medical device certification of the oxygen concentrator, buy delivery to the home, but also guide the installation.