Details With its carefully engineered acoustics and excellent materials, the EM5 reaches a new height in earbud sound quality. The well-extended yet controlled bass, lush vocals, and clear yet unfatiguing treble will give you an unforgettable musical experience. Bold Beryllium In its quest to be uncompromising in every aspect, the EM5 does not let you down with its sound quality. The large 14.2mm beryllium-coated diaphragm ensures well-extended, well-textured, and plentiful bass. The lightness and notable rigidity of beryllium also allow the EM5 to present well-extended and detailed treble. Together, the EM5 headphones capitalize on the strengths of their driver and present you with an unforgettable bold sound. The Acoustic Bass Tube In order to increase bass extension, the EM5 earphones contain a special flute-inspired acoustic bass tube to effectively boost lower frequencies, made possible thanks to advanced 3D printing manufacturing technologies. With the EM5, you will get solid and deep bass that will defy your expectations of what an earbud can do. Structurally, the driver unit is designed with long strokes, which allows for more spaces for the linear displacement, lower distortion, and better bass performance compared to a typical earphone driver. DLP 3D printing technology FiiO has implemented the 4th generation of DLP 3D printing technology to create the EM5, allowing for a uniquely seamless design simply not possible with other manufacturing techniques. It refreshes your ideas on just what earbuds can look like. And due to the use of skin-friendly, EU IIA medical-grade certified resin, the EM5 earphones are not only glossy and durable but also gentle and comfortable on your skin. Rich selection of accessories included To help you in your quest for the perfect sound, FiiO have carefully prepared 3 types of foam ear tips that allow you to tailor the EM5 perfectly to you and your music. Multi-packs of Balanced, Bass and Crisp version of eartips are all included. And to make things convenient, the included HB3 leather carrying case allows you to easily carry the EM5 and its accessories wherever you go. FiiO doesn’t underestimate the effect of a great cable on an earbud’s sound quality so the EM5 comes with a high-purity sterling cable with high conductivity that not only allows for loads of detail to come through, but also provides an extremely enjoyable, vivid sound. And the high-quality earphone cable is ready to change at a moment’s notice. The twist-lock swappable plug allows you to switch between 2.5mm/3.5mm/4.4mm heads to cover a wide range of scenarios.