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A travel adapter changes plug fit; a voltage converter changes mains voltage. Read INPUT labels, separate USB charging from AC pass-through, and pack the right gear.
Size a camping power station using your 12V fridge's daily watt-hours, not its compressor wattage. Worked examples cover 250Wh, 500Wh and 1,000Wh batteries.
Pair AirFly Pro 2 with AirPods using TX mode and PAIR 1, add a second pair with PAIR 2, and fix pairing or silent-audio problems before your flight.