Good news! The PS4 controller's Back Button Attachment works on iOS. | iMore
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DUALSHOCK 4 Back Button Attachment | Hardware and Accessories | PlayStation (US)
DualShock 4 Back Button Attachment review: A nice PS4 upgrade for $30 | Ars Technica
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DUALSHOCK 4 Back Button Attachment | Hardware and Accessories | PlayStation (US)
Gamepad Back Button Attachment with 3.5mm Audio Interface for Sony PlayStation 4 PS4 DualShock 4 Wireless Controller Accessories|Replacement Parts & Accessories| - AliExpress
DUALSHOCK 4 Back Button Attachment | Hardware and Accessories | PlayStation (US)
DualShock 4 Back Button Attachment review: small but perfectly formed | Eurogamer.net
DUALSHOCK 4 Back Button Attachment | Hardware and Accessories | PlayStation (US)
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