Originally Posted by
WineCountryUA
Besides not being battery operated and requiring an external power source. Plus not being plug compatibility with personal electonics. Most without certain skills will find these useless away from the plane -- deliberately so.
The current headphones don't need a power supply or anything special. They work in the 3.5mm jack on my laptop if I orient things right to get the second prong out of the way.
That said, they're no great prize, and I certainly wouldn't bother taking them.