FEATURES A DYNAMIC ELEMENT POSITIONED JUST OUTSIDE THE EAR; SOFT FOAM CUSHION EXPANDS FOR A CUSTOM FIT TO IMPROVE ISOLATION & ENHANCE DEEP BASS & TREBLE CLARITY; FIT ENHANCES ISOLATION TO PLUG OUT AMBIENT SOUNDS THAT INTERFERE WITH LISTENING EXPERIENCE ; FREQ RESP: 10 HZ-20 KHZ ; IMP: 16_; SENSITIVITY: 112 DB/MW; FEATURES A WHITE CORD TO COMPLIMENT MANY MP3 PLAYERS; CORD LENGTH: 4 FT; NO-QUESTIONS-ASKED LIFETIME WARRANTY