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Sony DualShock 4 Back Button Attachment Review - Touch Both Sides for Added Enjoyment
Sony filed a patent for its PS4 Back Button Attachment accessory
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PS4 Back Button: Controller attachment release date guide - price, reviews, where to buy | Gaming | Entertainment | Express.co.uk
PlayStation's new Back Button accessory is a wasted opportunity | Engadget
Controller Paddles Back Button Turbo key Dualshock Adapter For Sony PS4 | Being Patient