How to use a wireless controller on PS1 and PS2 - GameRevolution
PS1 & PS2 Wireless Playstation controller - Next Gen by Retro Fighters — Kickstarter
OSTENT PS1 PS2 zu PC USB 2.0 Controller Adapter Konverter Kabel Kompatibel für Sony PS2 Wired Controller : Amazon.de: Games
Wireless Controller Für Sony Playstation 2 Gamepad Dual Vibration Schock Für PS2/PS1 Joypad Joystick Controle USB PC Spiel konsole - AliExpress Verbraucherelektronik
Here's how you can use PS4 DualShock 4 Controller on PS1 / PS2 Game Console - JILAXZONE