The O-Two Single-Use “Open CPAP” Delivery System provides incredibly accurate CPAP delivery. CPAP, from 5–20 cm H2O, is provided by simply selecting the stated flow rate from the chart on the device from 8–25 L/min. A Luer port is provided for attaching a pressure gauge. The air intake port and inline hose eliminate the possibility of accidental occlusion. Nebulizer treatments can be provided “in line” between the mask and the device.