Ok it says REF450p SN P01076637 10D4. On the bottom of one side and on the other it says REMstar Heated Humidifier 1056215 H010764273CEA.
I realy need to sell this today and obviously I don'know much about it so I'll sayer at 300 ahd go from there. If u want to nKrumah me on offer fee free.

I have a respirator that has been bareluy used. Nasal pillow system, hoses and battery pack. User manual never even opened. Extra foam filter. PM for more info. Priced to sell IMMEDIATELY!!