*This product is a made-to-order item. ★Extension cable for STAX ear speakers made with HiFC (high-performance pure copper wire) ■Features●The wire material used is HiFC cable, which has already been used in several STAX ear speakers. ●HiFC is a registered trademark of high-performance pure copper wire developed by Hitachi Metals.It is a material that makes continuous casting possible by adding small amounts of titanium to copper to control impurities in the copper, and has high conductivity and excellent durability with little change over time. ●In terms of sound quality, it faithfully reproduces low to high frequencies, and has a balanced sound quality with little coloration, resulting in an extremely natural sound. ●The change in sound quality caused by extending the cable is minimized. *The image is for illustrative purposes only. This product is 2.5m long.