Spritech(TM) 3.5mm Male to Female Audio Stereo Earphone Extension Cable Oxygen-free Copper Wire Core Audio Line 3.5 mm audio extension cord, high-fidelity design, strong anti-interference, good use effect 24 k gold plated plug, plug and play, stable signal transmission Application: suitable for the?connection?between?mobile phones, MP3, MP4, DVD, computer and power amplifier, speakers transmit the audio signal oxygen-free copper with high purity, strong anti-jamming performance Perfect for Family, study, sitting room, bedroom, office, education, entertainment, business, meeting and so on