LIGHTWEIGHT WITH IN-THE-EAR DESIGN THAT DELIVERS ACCURATE ACOUSTICAL REPRODUCTION\, DEEP BASS & ISOLATION TYPICALLY FOUND IN CLOSED-STYLE STEREOPHONES; FEATURES A DYNAMIC ELEMENT THAT IS POSITIONED JUST OUTSIDE THE EAR FOR EXTENDED FREQ RESP; FREQ RESP: 10 HZ-20 KHZ; IMP: 16_; SENSITIVITY: 102 DB/MW; 4-FT STRAIGHT\, DUAL-ENTRY CORD; INCLUDES 3 SIZES OF SILICONE EAR CUSHIONS (S\,M\,L) FOR A CUSTOMIZED FIT; NO-QUESTIONS-ASKED LIFETIME WARRANTY