Genuine DUALSHOCK 4 Controller Back Button Attachment Purchased from a domestic authorized retailer, this is a genuine Japanese version. I bought this as a spare, but I didn't use it, so I'm putting it up for sale. It's a new, unused item stored at home. Stored in a dark place. Please refer to the photos to assess the outer box. The seal on the outer box is peeling, so I opened only the lid of the outer box to check the contents. (I haven't touched any of the tape that held the non-woven fabric inside, and it's still in the same new, unused condition as when I bought it) Back button attachment for the genuine DUALSHOCK 4 controller, enhances gameplay with additional button functions. DUALSHOCK 4 Back Button Attachment CUHJ-15017 PS4 controller back button, back attachment SONY genuine product, Japanese domestic version