The Aonic 4 is a brilliant sounding in-ear headphone from Shure with a comfortable 'over the ear' design and an outstanding ratio between price and performance. In this Aonic 4, Shure applies both a Balanced Armature driver for well-defined, crystal clear sound and a dynamic driver for a powerful bass. The frequency response ranges from 20Hz up to 19kHz, the impedance is 7 Ohm and the sensitivity is 106 dB SPL/mW. This makes this Aonic 4 perfect for use with a smartphone or digital music player. Due to the application of Sound Isolating technology, these in-ear headphones dampen the ambient noise by 37 decibels, so you'll enjoy your favourite music even more intensely than with the earbuds that were shipped with your smartphone. Designed for professional use, these in-ear monitors are built to last. The headphone cable has a length of 1.3 meters, is fitted with a 3.5mm jack plug and has MMCX connectors for easy replacement. The cable is equipped with a universal in-line remote (Android and iOS) and fitted with a built-in microphone. If you receive a phone call while on the road, you can answer it safely without touching your smartphone. For an optimal fit and long-lasting comfort, Shure supplies a Fix Kit with soft earplugs made from two different materials in the sizes small, medium and large. When not in use, store your headphones safe and secure in the included hard case.