At least two weeks prior to traveling, get clearance from the airline to use your device on a flight (if clearance is needed and your approval is in the form of a letter, carry a copy with you) Arrange to sit near a power source on the aircraft, or use an approved Transcend battery Carry a letter from your doctor certifying your need for positive airway pressure therapy Take a copy of Transcend’s FAA compliance letter for Transcend devices, found HERE Confirm the type of power cord or adapter used by the aircraft and for the country you're traveling to. Adaptors can be bought from most electronics and travel stores, as well as in airports. *Note that certain airlines require a battery to operate a CPAP device and do not allow the onboard electrical outlets to be used with CPAP devices.