From KZ, the innovators in the earphone industry, this is a set including three types of re-cable compatible earphones: "ZSX, ZS10, ZST," and "HiF4828 L-shaped cable 16-core 3.5mm QDC" and "ZS genuine purchase included re-cable cable." The three earphones cost approximately 15,000 yen in total, and the HiF4828 is about 5,000 yen, making this set worth approximately 20,000 yen. All items have been tested for power and have been stored after alcohol cleaning, so I believe they are all in good condition. In particular, when the HiF4828 cable is combined with the ZSX, you can enjoy a sound with a great amount of information and sharpness compared to the 16-core cable. The genuine cable is treated as a bonus, but of course, it can be used. I used these about three years ago, and they have been unused since I switched to wireless earphones. I am selling everything together to declutter. However... depending on the performance of the wireless earphones, the sound is still good. I was able to re-experience the goodness of wired earphones. For those who are particular about sound, or those who want to start building a wired earphone setup, how about it? Thank you.