When was the CSL Elite Wheel Base V1.1 released?
The CSL Elite Wheel Base V1.1 was released in mid-2019.
It was the successor of the original CSL Elite Wheel Base (V1) and therefore PC and (combined with the right steering wheels) Xbox compatible. The CSL Elite Wheel Base+ was very similar but PlayStation compatible as well. Looks of the CSL Elite Wheel Base V1.1:

The most obvious visual difference to the CSL Elite Wheel Base+ (the CSL Elite Racing Wheel - officially licensed for PS4) is the Fanatec logo on the side panel of the wheel base, which was not present on the PlayStation-compatible version. To identify the product, the full and precise product name can always be found on the product label on the bottom of the product.