Built-in Manometer allows the Rescuer to Verify and Monitor CPAP settings. Deluxe features include: Large Adult Mask with Head Harness and Straight Swivel Port. The first disposable CPAP System for Acute Pulmonary Edema with both built-in Manometer and Pressure Relief Valve. Highly portable, Less Oxygen Consumption. Fast, easy set-up. Easy to add a Nebulizer with the Nebulizer Adapter.