The oxymizer is the simplest conserving device available today, operating without electronics, batteries, switches or flow controlsReduces oxygen costs by up to 75%Allows you to obtain the equivalent of 7.5 liters from a 5-liter concentratorEliminates the need to deliver and service two concentrators for your high-flow patientsA close-coupled reservoir that fills with 20 ml of expired air at the initial phase of expiration, which is enriched or replaced with oxygen during the remainder of expirationPendant Style, Closed Couples 20ml Reservoir, Soft, Flexible, Disposable