BiPAP ST30 (Bilevel Positive Airway Pressure) Four-in-one noise reduction technology 2.8 inch TFT screen With 4-30 cmH2O Pressure range and 220ml water capacity. Ds-8 Ventmed Bipap Machine for Sleep Apnea Treatment. Modes: CPAP, AUTO CPAP, BIPAP,  T, ST, APCV Display: 2.8” Color Display Expiratory Pressure 4 – 30 cmH₂O Inspiratory Pressure 4 – 30 cmH₂O Tubing Heated tube Backup Rate 5 bpm – 50 bpm Humidity Levels 1 – 5 levels (heating & humidification) Alarms Mask off, pressure & tube abnormalities