High-performance drivers - From the in-ear 9mm to the ear bud 15mm and onto the on-ear 40mm, Pace headphone drivers create an outstanding frequency range of 20Hz to 20kHz. The resulting response is clear, effective JBL noise with exceptional bass and smooth vocals. Foam cushions - A pair of foam cushions are consisted of with the JBL Pace ear buds. These cushions boost convenience, which can let you listen longer without tiredness. JBL carrying pouch - Acclaimed noise deserves protecting. All JBL Pace headsets come with protective carrying pouches, which can likewise keep foam cushions from getting lost.