Sony MDRAS400EX Sports Headphones with Adjustable Ear Loop (Black) Driver Unit : 9 mm, dome type Sensitivity (db) : 103 dB/mW Frequency Response : 5 - 24,000 Hz Plug : Gold-plated, L-type stereo mini plug Cord : 47 1/4 in. (1.2 m), Litz cord Y-Type