At less than 10 lbs, the EverGo can go up to 8 hours between charges (depending on the flow setting). You can finally be free of those heavy cumbersome oxygen tanks and have the freedom to be spontaneous. The EverGo is simple to operate with its easy-to-use touch screen interface and requires very little maintenance. It is approved for airline travel and comes with an adapter, built into the included DC power cord, for use in airplanes (contact your air carrier for details on availability).