Useful for treating obstructive sleep apnea. It involves delivering air through a face mask and tubes connected to the device, which generates a stream of pressurized air that increases in response to measured airway resistance. Positive Airway Pressure (BIPAP) therapy is considered the gold standard treatment for sleep apnea. For 40 years, it has been the most effective treatment for a condition that can have significant impacts on sleep, unwanted daytime symptoms, and serious long-term health consequences. High-Performance Motor: Silent, brushless DC motor, 0.2s rapid response, 20,000 hours of service life Airway-Free Airway Design: Accurately monitors airflow signals while reducing noise Patented Fine Airflow Fine Airflow Tube: Equipped with the world's advanced pressure and flow sensors, it accurately collects pressure and flow signal changes for real-time control Field-Oriented Control (FOC) Algorithm: Field-Oriented Control (FOC) algorithm Product Features: Smart On/Off, Altitude Adjustment Leak Reminder, Leak Compensation Therapy Mode: CPAP, APAP Pressure Range: 4 ~ 20 cmH2O Pressure Accuracy: ± 0.5 cmH2O Interval Boost: 0 ~ 45 minutes Alarm Protection: Mask Fall Alarm Power: 100-240V, 50-60Hz DC 24V Automatic Altitude Measurement Compensation: 3500m Automatic Altitude Compensation USM Airway System: Ultra-quiet airway system PCM: Noise Reduction Technology 3A Self-Adaptive Frequency Adjustment Technology Specifications: Height: 10 cm Length: 27 cm Width: 13.5 cm Weight: 1.5 cm Airline Friendly: Yes Sold for 2800, we sold it.