Flow-Safe® II CPAP System - Over 50% less oxygen consumption - uses less oxygen while delivering high Fi)2. Built-in Mamometer - verifies delivered CPAP pressure & Pressure Relief Valve automatically adjusts to avoid excess pressure. Nebulizer (in-line capability) - clinicians can administer meds without the need for mask removal. Advanced Mask Design - lightweight contoured mask and elastic head harness provide a better seal and comfort.