Etymotic Er4XR Wired Earbud

High performance Balanced Armature drivers are precision matched to within 1 dB Transducers: Single high-performance balanced armature per channel. Specially designed for uncompromising accuracy in the mid to high frequencies with a bit of extra presence in the lower end Sleek, anodized, laser etched aluminum body and braided, reinforced detachable 5 ft. Cables with custom MMCX connectors 35-42 dB of noise isolation with a max output of 122 dB