DescriptionThis is a 2.5mm audio extension cable. The material provides the best signal transmission. The spring design makes it resistant to breaking and tangling. Practical extension cable for your headphone.Features-Color: Black-Material: TPE, oxygen-free copper -Size: 120.00X0.30X0.30cm/ 47.16X0.12X0.12in- The wire diameter is 0.35cm, the total length when not stretched is 130cm, including the spring wire part, it can continue to be stretched to about 2 meters- This audio cable is compatible with most smart phone- Wired control, with microphone, can answer, up,previous/next song and change volume- Adopting improved 2.5MM headphone plug without bayonet, compatible for Y40, Y50, Y45, LIVE2, S700, QC25, OE2, QC35, and etc.- All copper wire, no noise, professional and high-end