DELIVERS ACCURATE ACOUSTICAL REPRODUCTION & ISOLATION TYPICALLY FOUND IN MORE EXPENSIVE\, CLOSED-STYLE STEREOPHONES; FEATURES A DYNAMIC ELEMENT THAT IS POSITIONED JUST OUTSIDE THE EAR & CONNECTED TO A TUBULAR PORT STRUCTURE THAT IS INSERTED ON 1 OF 2 PROVIDED CUSHIONS: A FLUTED SILICONE OR CONFORMING MEMORY FOAM CUSHION; FREQ RESP: 10 HZ-20 KHZ; IMP: 16_; SENSITIVITY: 112 DB/MW; 4-FT STRAIGHT\, DUAL-ENTRY CORD; NO-QUESTIONS-ASKED LIFETIME WARRANTY