DreamStation Auto CPAP Machine by Philips Respironics is a variable pressure therapy device used for the treatment of sleep apnea, snoring, and other sleep disordered breathing. The auto adjusting feature means that the machine will detect when the user needs more or less pressure during the night. During your sleep cycle you may change positions such as turning to sleep on your back, which is a position that a person's sleep apnea is the worst. When the DreamStation Auto detects a blockage in your airway or snoring it will gradually increase air delivery until your airway is stabilized. This is the DreamStation Auto CPAP Machine with humidifier