This is a combined set of the CCA C12 and KZ ZVX. I bought the C12 to try out the sound. It's a used item, just the housing, but it's in good condition with solid connections. The ZVX is in excellent condition. I only listened to it briefly after overnight aging. The ear tips have been replaced with new, unused ones. This means you can listen to the C12 with the ZVX's cable and ear tips. The sound quality of both is quite good. The C12 has a clear, bright sound signature, while the ZVX has a balanced sound with moderate bass, in my personal opinion. I'm selling these to clear out my collection. They have been cleaned with alcohol wipes. They will be packaged in plastic for rain protection and shipped. Thank you very much. #CCA #KZ #ZVX #C12 #ReCabling #ChineseEarphones #ReCablingPossibleEarphones