The PS one is the Playstation 1 slim. released in 2000 able to play all PS1 games.
The console and controller was white instead of gray
For 2000-2007 the PS one lasted. The console was basically the same as the Normal PS1 but it was the slim version.
Controllers and extensions
It had a LCD Screen you where able to buy seperatly and play any PS1 game by just plugging it in and playing your game.
The DualShock Controller was white instead of Gray. The memory cards are the same.