Philips respironics REM Star CPAC

Philips Respironics REMstar Auto A-Flex CPAP machine. Includes ResMed Mirage FX for Her nasal mask in size small. Comes with tubing and power cord I’m selling for a friend ,I was able to turn it on but I’m sure how it is suppose to work. .. if you buy it and it doesn’t work or there’s a problem with it, I’ll give you a full refund. The mask is brand new still in the packaging, it says for a small woman Pick up in Steveston(Richmond)