The Bird Low Air/O2 Blender (used) with patent 3.895.642. This versatile Air/O2 Blender offers accurate FiO2 mixtures through two outlet ports, with a flow range of 2-120 LPM. It serves well with ventilators, flowmeters, and Blender Buddy, and can be used independently for mask CPAP, nasal cannula, and resuscitation bags.