Auto continuous positive airway pressure (cpap) with epr (expiratory pressure relief) is a brand new intelligent cpap. Adopts advanced sensor technology, automatically tracking patients' respiratory condition. Specification: 1. Pressure range: 4-20cmh2o 2. Work mode: cpap, auto 3. Ramp item: 0-60min adjustable 1min/step 4. Dimensions: 280l x 140w x 95h mm 5. Dc voltage: 24vdc 6. Dc current: 2.0a maximum 7. Tft screen: 2.8 inch, 320 x 240 8. Protection against electric shock: class ii, type bf 9. Data communication: sd card 10. Built in heated humidifier. Features: 1. Auto-adjusting pressure for personalized treatment during sleep. 2. More than 20hr real time data and more than 1 year used records can be saved. 3. Showing airflow and pressure waves on screen. 4. Sd card for data communication. 5. Combined smart technologies. 6. Contemporary and stylish design for bedroom appeal. 7. Epr(expiratory pressure relief). 8. Auto-leak compensation. 9. Auto-altitude compensation. 10. Alarm for power power and mask off. 11. Independent airflow channel. 12. Huge display, 2.8” tft screen, show airflow and pressure on screen. 13. Parameters lock: all the parameters cannot be changed after setting.