AKG K702 Reference Class Studio Headphones Over-ear designmaximum wearing comfort for long work sessions Sophisticated open technologyfor spacious and airy sound without compromise Patented Varimotion two-layer diaphragmfor improved high-frequency range and better performance at low frequencies Unique flat-wire voice coilfor higher sensitivity, better impulse and treble response Specially shaped 3D-foam ear padsfor optimum fit and ease of use Connectivity technology : Wired