Disable mouse accel Arch/KDE

Hey im new to Linux and trying to get familiare with it, especially since Steam OS 3 public release is around the corner.

I picked Arch as my distro and running the KDE desktop environment, now my question is how i fully disable mouse accel?

Everywhere i search for on the internet i find to change "Acceleration profile" to "flat" but i dont see the option. i only see "Pointer acceleration" is that the same thing or is it something different?

i try to fully disable mouse accel.