Features: New Hybird Technology: Professional acoustic tuning, four audible units, are responsible for different audio frequency bands.  8mm Ti-membrane Moving Coil: 8mm moving coil brings the stronger driving force strong low frequency vibration, extending the sound field and making the sound more infectious.  More Comfortable In Ear: The auricle position has an ergonomic tilt angle. Comfortable wearing design, you won't feel uncomfortable to wear long time, and won's fall during exercise.  High Class Pure Oxygen-free Copper Cable: Oxygen-free copper have good thermal conductivity and electrical conductivity. Sounds signal transmission is steady and low rate of distortion.  Two Types of Configuration: 3.5mm plug and Type-C DAC plug, you can choose the plug which you need according to audio connector port.     Specifications: Model: CSK;  Sensitivity: 108dB;  Resistance: 22Ω;  Frequency: 10Hz-40kHz;  Interface Type: 3.5mm;  Cable Length: 125cm;     Package Included: 1 pair * earphones;  1 * Earphone line;  3 pairs * Earplugs(different size);  1 * User Manual;  1 * Storage Bag;  1 * Warranty Card;  1 * Pass Certification;  1 * Winding Magic Sticker