Are intended for use in treating obstructive sleep apnea (osa) and hypoxemia syndrome triggered by osa in patient. Enhanced dynamic pressure stability effectively reduce the patient's work of breathing Compact design with built-in humidifier suitable for travelling Higher water/dust protection grade, make device more durable Automatic leakage & altitude pressure compensation ensure therapy pressure Quiet delivery of the required pressure guaranteeing sleep continuity Worldwide main power compatibility 100-240v Ramp function& dual backflow prevention technology Auto start & auto stop & display with backlit Technical specifications Power supply: ac 100-240v, 50/60hz, 350ml, in max scale Pressure range: 4-20cmh2o, 0.5cmh2o increments O 2kg, 30x20x20cm