Philips Respironics revolutionized sleep therapy by introducing bi-level positive airway pressure technology to treat obstructive sleep apnea. Emulating natural breathing with pressure relief at inhalation and exhalation, this proven technology does more than provide highly effective therapy – it delivers a level of comfort that can mean the difference between compliance and non-compliance for patients having difficulty adapting to traditional CPAP therapy. The System One BiPAP PRO includes all of the great features you expect from a sleep therapy system including a wide pressure range (4-25cm), patient adjustable ramp, AUTOMATIC altitude adjustment, data card, the latest BiFlex comfort technologies, and a universal power supply.