Sony MDRZX100 ZX Series Stereo Headphones Set of 4 with FSM Mini Speakers (4 Pack, with Speakers, Black) Please refer to Sony's Dealer Network for Descriptions, Bullet points and weights and measures Cord : 47 1/4 in. (1.2 m) Y-type Frequency Range: 12Hz - 22kHz Compatibility : 1/8" Headphone Jack Set of 4 with FSM Mini Speakers