Note： This product cannot be shipped by express shipping, but only by priority shipping or premium shipping. Features:- >7mm TrueResponse Dynamic Driver. >Neutral & Balanced sound tuning with fast and accurate bass response. >Aviation-grade AMLOY-ZR01 amorphous metal shells. >3D printed ear cavities. >Dual-Resonator Chambers. >Gold-plated MMCX connectors. >Comes with two cables(3.5mm and 4.4mm terminated). >Adjustable ear hooks. >Assembled by hands at Sennheiser facility in Ireland. Technical Features:- >Impedance: 18Ω. >Frequency response: 4Hz-46.5kHz. >THD+N: 0.06%(1kHz 94dB). >Sensitivity: 118dB. >Connector type: MMCX. Meet the all-new IE600, a premium set of Hi-Res in-ear monitors from Sennheiser. Covering the huge gap between the entry-level IE300 and the flagship IE900, the latest IE600 houses a 7mm TrueResponse dynamic driver on each side enclosed in 3D printed Zirconium housings. Sennheiser has years and years of expertise in designing premium audiophile-grade products especially dynamic driver IEMs and headphones. The latest IE600 brings promises you an excellent listening experience with a Natural and Clean sound presentation. Experience Quality Sound:- With years of experience in designing single-dynamic driver IEMs, Sennheiser has designed the latest IE600 with a 7mm TrueResponse dynamic driver unit per side. Their flagship IE900 also uses the same driver in a different housing and acoustic chamber design. IE600 promises you a quality listening experience with ultimate clarity and a natural, neutral tone to the output. 3D-Printed Zirconium Alloy Housings:- Sennheiser has crafted the ear shells for IE600 using high-precision 3D printing technology at their Germany plant. The cavities are made using AMLOY-ZR01, an aviation-grade zirconium alloy that is highly durable. The IE600 has a rich and elegant look with these Zirconium alloy cavities. They have an ergonomic design with a compact form factor ensuring a comfy fit for most listeners. Dual Resonance Chamber Design:- The nozzle in IE600 ear shells contains a dual-chamber frequency chamber that brings true Hi-Res details out of the music. All thanks to this dual-chamber design, IE600 produces an exceptional sound performance with unmatched clarity, detail, and ultra-low distortion. High-Quality Stock Accessories:- Sennheiser IE600 comes with a wide selection of compatible ear tips and ear hooks. Sennheiser has included two high-quality stock cables in the package, one with a 3.5mm single-ended termination and another with a 4.4mm balanced termination plus. The IE600 uses gold-plated MMCX connectors.