The Invacare Perfecto2 V oxygen concentrator is an economical addition to the premier Invacare stationary concentrator line. This 5-liter concentrator is small, quiet and lightweight and comes standard with the Invacare® SensO2® Oxygen Sensor. The Perfecto2 V unit incorporates many of the best features of the market-leading Invacare® Perfecto2™ Concentrator, including its contemporary, patient preferred external design and color.