This is a set of TRN earphones and a DAC. The Shell was purchased new on Amazon in June for 8800 yen. The BlackPearl was purchased new on Amazon in May for 5980 yen and has been opened and used. Compared to similarly priced earphone DACs, these are very good products and highly rated. The Shell, in particular, has excellent sound quality. However, there is one issue: the Shell is a bit heavy and didn't fit my ears well. People with smaller ears who usually use size S or smaller ear tips might not find them comfortable. I believe they are fully functional, but please understand that these are used earphones before purchasing. If you are concerned about the condition, please refrain from purchasing. I will wipe them with an alcohol wipe, put them back in the box, and take measures against rain. I will ship them within 24 hours in most cases. Thank you. #CableReplaceableEarphones #WiredEarphones #TRN #DAC