Drawing on expertise learned from building some of the finest loudspeakers in the world, JBL engineers created lightweight, over-ear headphones with a fresh look and uncompromising JBL sound. The J55i"s premium drivers generate clarity and extended bass that competitive products simply can"t touch. Pure, accurate bass means you hear the truth from your music. Our unique, DJ pivot mechanism lets you rotate either ear-cup up to 180 degrees, so one ear can hear outside sound. An in-line microphone lets you take calls without taking the headphones off. And bold styling makes J55i headphones an aesthetic, as well as acoustic, triumph.