you're welcome.

its still a great machine and reasonably quiet too.
i'm surprised more people aren't using them.

for some reason they have now disabled that feature. it wont effect your therapy tho.
it just means your machine will respond throughout the whole pressure range its set at

hey this model is wearing a new type of mask too

http://www.amazon.com/CPAP-Pillow-Memor ... 7&sr=1-188