earphone for aviations ...... JOYSTAR Fashionable Stereo MP3 MP4 earphone/Headsets/headphones, Aviation Headset Stereo MP3 MP4 earphone earpiece for ipod /iPhone , and computer ... for business class and economy class. 2.ear phone ,headset headphone Material :ABS/and for customers inquiry3.Color:Optional( ... ohm/300 ohm(optional)12.Plug:3.5mm/2.5mm stereo pin(single ,double , folding pin is available, or ...