... : options,Weight: 170gJOYSTAR Fashionable Stereo MP3 MP4 earphone/Headsets/headphones, Aviation Headset Stereo MP3 MP4 earphone earpiece for ipod / ... all kinds of airline earphone/headphone, disposable earphone/headphone, noise cancelling headphone and other in flight products with very competitive ... at 1000HZ11.Impedance: 32 ohm/300 ohm(optional)12.Plug:3.5mm/2.5mm stereo pin(single ,double , folding ...