Kadxyan Oxygen Machine, 3 L/min Oxygen Machine, Portable Oxygen Generator, Small Oxygen Concentrator O2 Generator for Home and Travel Use Car Air Purifier

Got one of these, does not seem to provide most oxygen, makes a lot of noise and vibration, Not discrete device, due to the noise it makes. 2/10

I find this oxygen machine good to use it’s no noisier than my n h s machine wish I could buy another battery for it as it only lasts an hour . Took it abroad found it easy to use I’m satisfied with it .

I have used this machine for a year and used it once in the car and turned it on once in my bit. I live half time in America and half time in Scotland. I have done so for 15 years and have several machines. I can not get ahold of customer service but am most unhappy with it. When you turn it on it sounds like a jet plane taking off. If they have a better one that allows me to sleep can I trade the thing in.?