Thank you for viewing. This is a Pioneer DDJ-wego3. I used it by connecting it to a PC via USB. It can also connect to an iPhone, and I have confirmed that it works. There are no defects in the buttons or knobs. Regarding the appearance, there are scratches (?), on the left and right discs and the back. Also, there are fine scratches overall due to use, so please refrain from purchasing if you are sensitive to this.