Thank you for viewing. USB Digital Audio Master Clock Generator For sale is a MUTEC MC-3+USB (2015 model, initial lot). I purchased this used several years ago and used it in a configuration of external clock input → DAC output. At that time, I could feel an improvement in sound quality, and it was working normally within the scope of my use. The LED lights are also confirmed to be working without any problems. However, I have not checked all inputs/outputs and detailed functions, so I will sell it as-is. The exterior has no noticeable scratches or dents and is in relatively clean condition. It was used in a smoke-free and pet-free environment. Although there are no genuine accessories, the following items will be included: • Power cable (not genuine) • Instruction manual downloaded from the official website (printed version) 【Please Note】 ・Please understand that I cannot guarantee all functions before purchasing. ・Please refrain from purchasing if you are concerned about minor details, as this is a used item. ・Please note that returns and refunds are not accepted.