Made of high quality pure copper gold plated processing wear-proof oxidation and corrosion resistance. Reliable connection good conduction with maximum single transfer and durability no distortion. Suitable for microphone audio equipment mixer subwoofer etc. other RCA-enabled device audio signal connection. Good conduction excellent sound quality truly pure and no-noise signal transmission very suitable for professional sound card output. BEKER provides 2 years worry-free warranty 90 days refund and replacement