The Eclipse 5 has SeQual's AutoSAT technology, which helps you maintain the same amount of oxygen consistently, even as your breath rate changes. The Eclipse 5 is only 18.4 lbs with the battery inside, and is 19.3 inches tall, 12.3 inches wide and 7.1 inches deep. Even though it's one of the heavier portable oxygen concentrators on the market, which it needs the extra size to house the extra settings and features, it is easy to move about with the help of the mobile cart that comes with it. The SeQual Eclipse 5 is approved by the FAA and meets all FAA requirements.