Oxygo Next. Purchased in 2021. Used twice. Works very well, Intended for supplemental oxygen. Supplies a high concentration of oxygen used with a nasal cannula to channel oxygen from concentrator to patient. Can be used in home, vehicle. Sells for $5000 new. As it turned out husband did not need oxygen during day but night time only on his cpap with oxygen. Ideal for travel. A further read on the actual website OXYGO. OBO