Philips SimplyGo Mini is the next step in innovation for patients who have realized the benefits of portable oxygen therapy. Respironics has continued their tradition of leading the industry in manufacturing oxygen products designed for reliability and ease-of-use. With up to 4.5 hours with the standard battery and 9 hours with the extended battery, the SimplyGo Mini is able to provide the patient with unrivaled freedom. Weighing only 5 pounds(2.3 kgs) with the standard battery or 6 pounds(2.7 kgs) with the extended battery, the SimplyGo Mini allows the user to chose the power and weight option that works best for their own lifestyles and needs. This machine makes it even more possible now, to stay active and on the go while still getting the oxygen therapy you need. It has a maximum oxygen setting of 1,000 ml/minute on the setting of 5. The lowest it provides is 220 ml/min on the setting of 1. The oxygen purity runs between 87% and 96%, with an average of around 93%.