Etymotic Research ER4XR Extended Response Precision best Matched In-Ear Earphones

Product Name: Etymotic Research ER4XR Extended Response Precision best Matched In-Ear Earphones
(Detachable Balanced Armature Drivers, Noise Isolating, High Fidelity, World Leader Response Accuracy) , Black , Standard High performance Balanced Armature drivers are precision matched to within 1 dB 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 best output of 122 dB Impedance (@1kHz) 4XR (45 ohms) 4SR (45 ohms) Connectivity Technology: Wired Included Components: Headphones, Case, Tip Pack, Manual —For Item Specifications - please refer to images. —Packaging may have cosmetic wear due to shipping/storage, this does not affect the item. Please refer to photos. ✅This product Appears To Have No prior use/wear✅.