Yes, it has KSF phosphor.
For more information please read
www.testufo.com/red-phosphor
It doesn't prevent motion blur reduction, it simply worsens the quality of motion blur reduction.
Also, KSF phosphor doesn't interfere with the operation of the monitor
IF you aren't using motion blur reduction. These wide-gamut IPS panels are beautiful, no matter what monitor they're in -- these LG panels are among the better IPS LCDs as long as you aren't using motion blur reduction. For users who don't use strobing, these KSF-based panels been generally well regarded in other models (e.g. LG27GL850B or XG270QG). It's just annoying if you're using motion blur reduction.
NOTE: It's important to note there is
no "Blur Busters Approved" logo forthcoming for any KSF-phosphor-based monitor panels since the red phosphor limits the quality thresholds attainable. Not the worst strobing I've seen, but not the best either, as it's bottlenecked by KSF.
That said, however, I am indeed an advisory role in making sure that they do overdrive & motion blur reduction properly. See
forum post here.
So yes, it has a User Defined Overdrive slider, and yes, it does single-strobe 60 Hz.
Just be aware of the pros/cons and caveats/pitfalls, especially when buying crowdsourced projects like these.