Do these work on British Airways? I might be wrong but the airline provided headphones seemed to have one pin longer than the other?

Hello, Whether is a Boeing or Airbus the connector for the headset are all the same. If the particular airline requested a special plug then they will need to supply the proper adapter to the passenger. I would really doubt it since this cost the airlines money. You can contact the airline or look in their website. They may offer more information. I hope this helps, Good luck and happy flying- Thank you

Do these work with airfly pro devices?

Ah I’m not that familiar with this adapter. It should work, however - Remember that you need to charge so it works. It does not get power through The 3.5mm port.

Do these work on Qantas flights?

Yes! Used one on a QANTAS flight this month.

Would they work with Sony XM4 ?

They will work with anything that needs a 3.5mm single connector. However, the 2 prong connector did not work in the Aircraft I flew on, it only required a regular 3.5mm earphones connector.

ASIN	B07GB76D89
Best Sellers Rank	#3,322 in Electronics ( See Top 100 in Electronics ) #64 in Headphone Adapters
Brand	Posdou
Color	Golden
Compatible Devices	Headphone
Connector Type	Auxiliary
Customer Reviews	4.5 out of 5 stars 1,690 Reviews
External Testing Certification	Não aplicável
Finish	Gold
Finish Type	Gold
Item Weight	0.02 Kilograms
Manufacturer	Posdou
Model Number	8541767915
Number of Items	2
Number of Ports	2
Package Quantity	1
Power Plug Type	No Plug
UPC	711796579914
Unit Count	2.0 Count

Dual 3.5mm Male to 3.5mm Female Airplane Headphone Adapter Gold Plated (2 Pack)

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