2-pin Earphone Upgrade Cable - Like New 【Improved Sound Quality】By using 4-core silver-plated wire and copper wire, the low frequencies gain more depth, and the mid-high frequencies achieve further resolution and an overall improved balance. 【Silver-plated Wire and Copper Upgrade Cable】Excellent resolution and sound localization, with a particularly good sense of sharpness in the sound. 【Soft and Comfortable to Wear】The use of soft and flexible materials makes it easy to handle.