A Prisma 20A Heinen & Lowenstein CPAP in excellent working order and ideal for travellers. The Prisma 20A has a world clock with alarm so you can travel between time zones without any problem. The machine is very solid and comes with its own purpose designed case.
The Prisma 20A has had excellent reviews:-
The whole machine looks and feels very well built, solid and is very easy to use (user friendly I would say), having zero mechanical controls, but only a big touch screen. I also like very much its expandability with features like add-on cards for medical use. This feature - in my opinion - indicates the high technological level of this CPAP.
Taken from the apnea board com forums.
New the machine costs about GBP 800 - offered at £ 250-00.
It has been used for about a year and is in excellent working condition.