I have a problem. I cannot breathe most of the time, I am OK at home as I have oxygen concentrators at home, and oxygen bottles etc.
I made a radh decision to trust adverts which proclaimed that they had a portable oxygen conentrator for just over £600 which worked. It was a Chinese firm that had purchased Google adverts, and was basically selling a shit service, as it has turned out to be.
I( purchased a portable oxygen conentrator 1-5L for £639 plus another £100 for a spare battery.
It is crap. It is noisy to say the least, it farts a lot noisily. It is also unable to produce nmore than 1 litre of oxygen as output.
On complaining, I was asked to produce a video, which is now on Youtube, but no response as yet.