I did purchase this as an “open box” tested to be in working order. This has been HEAVILY USED! The water reservoir has so much scum on it you can barely see my fingers thru it holding it. Scuff marks and scratches. Go figure… NO DIRECTIONS. Even for an “open box” this is disappointing. This is like Thrift store shopping condition. Gross.

Just got it and set it up. It is a very good machine. Thinking about getting another for a back up.

This was what I needed; but, my apartment was too small and cluttered for it to be used safely. I had to return it and received the refund right away. Thank you! I will, likely, purchase again, when I move to a better place.

This Ogygen Generator is just what we were looking for, it doesn't take up a ton of space, and it is lightweight so I can easily lift it and move it to where we need it, it came fully equipped to operate as soon as we received it, it is very quiet, shipped quickly and easily, thank you! It looks exactly like the product photos, no surprises.

So far very happy with my purchase. It's quite and is working very well, only on 2 liters at night. Definitely is working for my needs.

We returned it as it was not the one we ordered, and the description was very decieving from the unit sent. First photo is what was sent 2nd photo is what we ordered. We are happy with our pervious purchases , this one not so much

Seems to work. Instructions are not that clear. I got the open box so cheaper than new.

Soy asmática y me ayuda a mejorar la respiración.gracias

I was told that it doesn’t come with tube lines but it actually does. Everything you need is included. A little confusing directions!

Looks like quality product. Tested the product, blood oxygen saturation rises from 91% to 97% in less than 30 seconds. This indicated that the oxygen concentration is good enough and close enough to medical grade machine.