The DualShock 4 Back Button Attachment (CUHYA-0100) is a Sony-branded external attachment specifically designed for the Sony PlayStation (PS4). With two programmable back buttons, this attachment enhances the gameplay experience by providing additional customization options for players. Compatible with the Sony Playstation DualShock 4 controller, this product allows gamers to tailor their gaming experience to their preferences, making it a valuable addition for those looking to improve their control and precision during gameplay.