Amazon.com: HORI Tactical Assault Commander Grip KeyPad and Gamepad Controller for PS4 PS3 PC : Video Games
Gamenetics
Amazon.com: HORI Tactical Assault Commander (TAC:Four) KeyPad and Mouse Controller (PS4/PS3/PC) : Video Games
Amazon.com: Sehawei Mouse Keyboard Converter, Game Controller Adapter for USB 2.0 Mouse Portable Keyboard Adapter Compatible with PS4/Xbox One/N-Switch/PS3 : Video Games
PlayStation 4 is getting a keyboard/mouse controller – Destructoid
HORI TAC KeyPad and Mouse Controller for PS4 and PS3 FPS Games - Fast Deivery | eBay
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Officially Licensed PS4 Mouse and Keyboard Controller Revealed - GameSpot
eXtremeRate Whole Tactile Clicky Kit for PS4 Controller Shoulder Face Dpad Buttons, Custom Flashshot Button Stop Flex Cable, Mouse Click Kit for PS4 Controller CUH-ZCT2 JDM-040/050/055 – eXtremeRate Retail
How to Use a Keyboard and Mouse on a PS4
SplitFishGameware FragFX Shark PS4 - Mouse controller for PS4