The upgrade cable is made of 5NOCC braiding, which has strong corrosion resistance and anti-interference ability. The highly elastic transparent PVC protective layer makes it tougher. The transmission rate is stable, the middle and low frequencies are more prominent, and the overall sound quality is full. Upgrade your hearing experience on hi-resolution, audiophile or HiFi headset. Compatible with Sennheiser HD820 HD800S HD800 headphones cable, (Red R right side, Black L left side). Work with devices with standard 4 Pin XLR jack, Compatible with Sony TA-ZH1ES, Shanling H2.2, WOO WA22, Aune S7, S6, X7S, VIVA Audio Egoista 845, Simaudio MOON 430HA, MK3 SE, Compatible with Aune S7, S6, X7S, SPL Phonitor X/E, Lake People Violectric V281, Yulong DA9, Aquila Amplifier. Package includes: 1 x headphones upgrade cable.