Military headphones, at least the older ones ... they most often have high-impedance drivers and annoyingly proprietary connectors for whichever obscure radio system they were a part of.

This airline adapter converts a dual-prong airline jack to a standard headphone stereo plug (3.5 mm, 1/8 inch). Plug the headphones cord into the adapter and insert it into the airline jacks to ...

Want a little more from your Bluetooth headphone adapter? The AirFly Pro is pricier, but its ability to stream audio from a phone to another system, such as in and older car or wired to a ...