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 40 liters/min at 10 cmh2o 2kg, 30x20x20