C-Flex+ provides an advanced flexible expiratory pressure feature for fixed CPAP. C-Flex+ models the advanced algorithms of Bi-Flex and A-Flex to provide a transitional flexible pressure relief as the patent moves from inhalation to expiration. This is followed by the flow-based pressure relief at the beginning of exhalation that includes an additional 2cm H2O pressure decrease. As the patent moves into inspiratory stage, pressure returns to the set CPAP level prior to the next breath. C-Flex+ is a promising new approach to CPAP therapy using flexible pressure technology. The REMstar Pro with C-Flex+ delivers three different therapies: CPAP, CPAP with C-Flex and CPAP with C-Flex+. The System One REMstar Pro C-Flex+ is used to treat Obstructive Sleep Apnea. System One Humidity Control has been designed to establish optimum patient comfort and device performance. For additional comfort, System One now has improved absolute humidity and target relative humidity levels across all humidifier dial settings. In addition, a new “classic” mode provides the ability to shut off humidity control. Even in changing environmental conditions, consistent humidification levels are preserved throughout each night. System One closely monitors room temperature, room humidity, and flow to determine what is required to maintain the patient-selected humidity level. By controlling relative humidity output at the mask, rainout can be prevented, under most circumstances. Through a combination of our cleverly-designed water chamber plus the advanced Dry Box design, the risk of water ingress into the device is virtually eliminated. Even when fully filled, to the fill line, the water chamber can be tilted or turned upside-down without leaking back into the device. Should any water manage to escape the chamber, the Dry Box prevents it from entering the device. The System One device incorporates a room temperature and humidity sensor with a temperature sensor at the end of the Heated Tube to deliver the selected level of humidity to the patient while providing protection against rainout. As a result, higher levels of humidity can be achieved for patients who could benefit from humidification. Digital Auto-Track Sensitivity is the brains behind all Flex Family pressure relief technologies. Digital Auto-Trak is a highly sensitive algorithm that tracks each breath and detects the onset of inspiration and expiration – even in the presence of mask leak. It then responds by triggering the machine to provide an adaptive pressure relief right when the patient needs it. Delivering the right level of pressure relief when patients need it makes therapy more natural – and more comfortable.