It is lightweight. Came with what you would need to run off battery. And battery charger for car and outlet. Easy to use. We are happy.

It is excellent with a humidifier that keeps your nostrils from drying out and an anion that removes dust from O2 intake.

I just received my POC_05 oxygen concentrator yesterday. It took a while to set it up and I even experimented with the very form fitted case, ( that I found useless and too hard to put on and it was not worth the effort). The instruction manual was not very useful for some things and it did not even have the name of the unit anywhere in it, It did have pictures of it.
I thought that I would start with the negative. The unit with the battery and charging unit weighed 20.4 pounds, without the battery it weighed in at 16.4 lbs, Thus the battery is very heavy coming in, if my arithmetic is right, at 4 lbs additional weight to the unit minus the weight of the bag and cart which makes the battery slightly less than 4 lbs.
The noise was 53 to 54 dB 6 feet from the unit, the oxygen quality with the humidifier that does not dry out your mouth and the anion that removes dust from the air intake make for easy breathing like no other concentrator. I would give this unit 10 stars if I could and as for the instructions, I lived in the PRC for 3 years and the translator is doing the best than he can with another language that is difficult to learn.

Does your company give FIRST RSPONDERS A DISCOUNT ?

I really like this new machine. Hacenor is a pleasure to work with and offer superb customer service as well as fast, free shipping. Great company with great products.