Features: [Professional Configuration] One side 4 balanced armature drivers+10MM double magnetic dynamic, offer more independent high-frequency unit combinations, independent Mid and high frequency unit combinations, and full-band powerful sound quality output. Meanwhile, it has dynamic low-frequency Ambience and sense of force, as well as bright resolution and cohesive of balanced armature. [Advanced Technology] PCB frequency dividing board+acoustic structure physical frequency division, give full play to the performance advantages of each pronunciation unit and take into account the performance of high, medium and low tri-band, providing a smooth and sensual detailing experience. [Upgrade Detachable Cable] Modified 2PIN replaceable cable design, can turn the earphone into BT headset or improve its sound quality by replacing the upgraded cable (not included). The cable is anti-pull, anti-bending and corrosion resistant, providing excellent sound quality signal transmission. [Premium Quality] The earphone case is made of 6063 aluminum alloy or 304 stainless steel (optional), both of which feature high quality, beautiful and durable to use. [Comfortable Wear] The cavity structure is ergonomically designed to fit users' ear canal like a tailor-made one, bringing a comfortable wearing experience all day. And the earphones can directly isolate about 26dB of noise, allowing you to hear music details clearly even in a noisy environment.