Specification 1. Auto-adjusting pressure for personalized treament during sleep; 2. More than 20 hr real time data and more than 1 year used records can be saved; 3. Showing airflow and pressure waves on screen; 4. USB port for data communication; 5. Within EPWORTH Questionnaire; 6. Combined smart technologies; 7.Contempprary and stylish design for bedroom appeal; 8. EPR (expiratory pressure relief); 9. Auto- Leak Compensation; 10. Auto-Altitude compensation; 11. Alarm for cut down the power; 12. Overheating protection; 13. Independent airflow channel; 14. Huge display, 3.5''TFT Screen, show airflow and pressure on screen; 15. Parameters lock:all the parameters can't be changed after setting; 16. Use reports: better month use report.