Portable oxygen machine

It’s got several strengths so can be used on low settings as a therapeutic relaxant/concentration enhancement for students etc but mostly it’s designed to take the place of a portable oxygen cylinder for the ill. Cancer patients often use it as well for therapeutic purposes. There is a link there to a YouTube video so you can see what’s what. It’s boxed up so I don’t want to be taking it all asunder for photographs. Note: it comes with an instruction booklet informing you how to use it properly and you buy at your own risk if used unsafely or improperly. Consult your medical professional if necessary.