The oxygen concentrator is a machine that filters out the nitrogen and also other gases in the air close to you, giving you purified oxygen through a skinny tube. There's two kinds of concentrators: a bigger product that can be used in your own home, in addition to a lighter, https://fetal-doppler-for-home98642.targetblogs.com/21576400/how-much-you-need-to-expect-you-ll-pay-for-a-good-battery-portable-oxygen-concentrator