Good info, but I have already put it to the max setting. My old settings were higher than the max of this machine. As far as I can tell this machine is not even appropriate for me. This is the 3rd reboot from the VA. I was very happy with my first machine which I had for about 9 years. The second machine they issued out was pretty good, although they changed the masks which were not as good. They changed them out after l0 - 11 years. This machine has been just constant battle for the nearly 3 years I have had it. Guess will see who gets the next contract and maybe it will be better.