FEATURFeatures:Quiet: Low noise level: <28dB. 4-grade silencers.Reduced sound level 1: DC motor core static super-fast performance muffler.Reduced sound level 2: System airway static USM super silencers.Reduced sound level 3: Technical PCM relative silencer.Reduced sound level 4: 3A gas cap.Comfortable:FPS-Tech Engineering pressure adjustment automatically adapt.Technical im-Auto automatically applies smart home.Simple operation: just press the start button, the average one-day moisturizing line TM, 3.5 inches LCD screen. Technical Specifications:Pressure Range: 4-20 cmH20Tolerance: ± 0.5 cmH20Response time: 0-45 minutesFunction warning: warning masks fallPower supply: 100 - 240V, 50 - 60Hz / DC 24VAltitude ensure accuracy: ≤3500mHumidifier tank capacity: 210ml.Low noise level: <28dBES:Easy-separated structure - Device can be separated from humidifying tank, portable PAP can be used individually.Easy man-machine - Button for quick use.Clear - 3.5 inch-screen, clear treatment information.Top LOCK & LOCK Humidifying Tank - Medical PC material, safe and non-poisonous.Auto-On/Auto-Off - Auto on and off after treatment.Portable - Humanized packing and designed details for convenience.