Single dynamic driver in-ear by Korean micro-speaker company called Dynamic Motion.
* Headphones iPod, MP3 player headphones * Sports stereo headphones. * Comfortable to wear all day long. * Our design fits like a soft spring. * One size fits all. * Compacts, stores anywhere. * Plugs into any standard 1/8" (3.5mm) headphone jack. * Our discreet design is almost unnoticeable to others. * Utility patent pending.