This earphone is specially designed for music lovers who want to couple outstanding audio quality with stylish design. It shows off an anodized CNC diamond-cut aluminum alloy sound chamber with a CD pattern engraved design and a graphene diaphragm, which will surely delight users with more natural sound and a tri-band balance. The original integration of dual moving-coil and moving piston audible units assures more exquisite sound quality. Luca Bignardi (the Grammy recording master) toned for this earphone again, which makes everyone can enjoy the wonderful music. Constructed of 25-step process, high class look Original integration of dual moving-coil and moving piston audible units High fidelity graphene diaphragm for more natural sound and a tri-band balance Has supposedly gone through 700 quality tests 45-degree bevel in-ear design, comfortable and easy to wear Built-in high quality microphone for clear phone call Come with 4 pairs (XS/S/M/L) of pacifier-level silicone earbuds Flexible matte TPE cable, more solid and durable Full-metal controller highlights the elegance and allows smooth operation Note: MIUI supports customization of control buttons. Specification: Product Type: QTEJ02JY Earphone Type: In-ear Line-in Control: Yes Speaker Impedance: 32Ω Frequency Range: 20Hz - 40KHz Sensitivity: 98dB Plug Type: 3.5mm Rated Power: 5mW Standard: Q/WMSX004-2016 Cable Length: 1.25m Weight: 17g Compatible with: Xiaomi devices Samsung Sony Huawei etc Android devices iPhone iPad iPod iOS devices with 3.5mm audio jack Package included: 1 x XIAOMI Piston Pro In-ear Earphone 1 x Silicone Cable Winder 4 Pairs of Earbuds (One pair of earbuds are on the earphone) 1 x User Manual 1 x Cloth Bag