In-ear 9mm high definition headphone with passive noise isolation. Features crisp highs with balanced bass and mids for the discriminating listener. Works with iPhone, iPod, MP3, CD, DVD, PSP and computers Wooden housing for crisp, accurate music reproduction Available in two beautiful finishes, Black Chocolate and Silver Cherry Passive noise cancellation minimizes ambient sounds Ultra lightweight design with PVC-free, tangle-resistant cable Dynamic driver features 20Hz to 20kHz frequency response 3.5mm gold plated plug for increased sound clarity Four sized flexible silicon ear inserts for secure fit (s/m/l/xl) Cord clip and cotton carrying pouch included