Love the clicky buttons they remind me of the SP and DS. : r/retroid
RetroidPocket3+ Psx buttons : r/retroid
Amazon.com: Dockable Translucent Case for RP2S 2.5 ,Dockable Case Compatible with,Protective Cover case Compatible with Retroid Pocket 2 Plus, Soft and Light Silicone,Comfortable Strong and Durable : Video Games
Retroid Pocket 2 Review - HubPages
A quick reference to RetroArch buttons on RP2 : r/retroid
SakuraRetroModding PlayStation Buttons : r/retroid
Retroid Pocket 3+ with PS Vita Buttons and Grip : r/retroid