This is a black FiiO K11 headphone amplifier. It is a genuine import purchased from Amazon Japan in November 2024. I bought it as my first headphone amplifier after seeing its high ratings, despite being an entry-level model. However, the sound didn't suit my taste, and I stopped using it after about two months. I am selling it to make room for new equipment. ・The unit, box, and all accessories are included. Please refer to photos 1-2. ・There is some minor wear and tear, but in my opinion, it is in beautiful condition with no noticeable scratches. Please examine the photos for your assessment. ・I have confirmed that the operation knob, headphone jacks (balanced/unbalanced), and line output are all working without any issues. The optical and coaxial inputs/outputs are unused. ・Please understand that this is a used item sold by an individual. I have done my best to check the functionality and clean the unit so that the buyer will be satisfied, but there may be some imperfections. Therefore, please refrain from purchasing if you are looking for a perfect item or are overly concerned about minor details. ・As proof of purchase, I will include a copy of the qualified invoice issued by the retailer, with personal information blacked out. ・I am unable to accept price negotiations.