Etymotic Research ER4SR Studio Reference Precision Matched In-Ear Earphones (Detachable Balanced Armature Drivers, Noise Isolating, High Fidelity, World Leader Response Accuracy)

* High performance balanced Armature drivers are precision matched to within 1 dB * Sleek, anodized, laser-etched aluminum body * Braided, reinforced 5ft detachable MMCX cables * 35-42 dB of noise isolation with a max output of 122 dB * Precision machined metal bodies with anodized finish