Thank you for viewing. I am listing this because I no longer have the opportunity to use it. Operation has been confirmed. There are small scratches and scuffs, so please understand this before purchasing. DUALSHOCK 4 Back Button Attachment By attaching two additional buttons to the back of your wireless controller (DUALSHOCK 4) and assigning functions such as △○×□ buttons and directional keys to each button, you can enjoy games more freely without compromising the functionality and comfort of the existing DUALSHOCK 4. In addition, you can easily customize it even during gameplay while checking the button assignments on the OLED screen.