What type of warranty does this machine have?

Does this have international voltage?

If one I were to compress a tube on either side, would I still receive the same amount of pressure?

Where is the exhalation port on this system?

Actually Wulfman- You are right!! I double checked and I am wrong- SO don't listen to my advice on the m series module and Good luck trying to sell on a site. I have seen machines sold on craigslist. But I agree with a previous poster about keeping it as a backup.

Actually the M series smart card module will store the same information on the card as the M series pro. I should know as I checked with the manufacturer.

You can purchase the M series smart card module for the M series plus and it will hold the same functions as the M series pro.

Check out cpap.com and search for product Part Number 1027563.

Hope this works!!