Philips Respironics PR SYSTEM ONE REMSTAR PLUS brings a wide array of proven technologies together with patient focused advancements to create a truly intelligent sleep therapy system.The System One REMstar PLUS includes all of the features you expect from a sleep therapy system including a wide pressure range (4-20cm), patient adjustable ramp, MANUAL altitude adjustment, SD data card, and a universal power supply. In addition it includes respironics brilliant C-FLEX comfort technologies, basic therapy tracking and compliance reporting capabilities. Rain-out and water damage are large contributors to machine failures. The PR CPAP humidifier and water chamber are breakthroughs in delivering consistent humidity without compromising water management. System One and Dry Box Technology make it possible for the PR CPAP machines to be virtually spill-free. This humidifier can be tilted, shaken, or turned upside down without water leaking back into the device. Even with a chamber filled to the "Full" indicator line, this unit can be transported safely and reliably. System One is the first humidifier in the industry which accounts for room humidity. Sensors inside and outside the CPAP machine closely monitor changes in humidity and prevents condensation from forming inside the tube.