We wanted to have some emergency oxygen around for when my elderly Mother-in-Law visits, but typically it requires a prescription and the tanks are large and clumsy, while even the cheapest electrical portable oxygen concentrators are very expensive. This is cheap, easy to get and very portable and easy to store.It would be nice if the regulator was adjustable, but it is meant as emergency oxygen, so that's understandable it's not. It works fine with the face mask included, but it's too much pressure for comfortable use with a nasal cannula.
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