The Acer Nitro XV252QF is a 24.5-inch gaming monitor with an exceptionally high refresh rate. According to Acer, the Nitro XV252QF can reach 390 Hz, dwarfing the refresh rates of most gaming monitors.
https://www.notebookcheck.net/Acer-Nitro-XV252QF-gaming-monitor-launches-with-a-huge-390-Hz-refresh-rate.537302.0.html
Psss, "huge" is now how you describe a frequency. Use "fast" "superfast" "blazingly speedy" or something instead.
And I wouldn't get too excited about 390hz anyway as it surely sacrifices other qualities like, well, quality of a montior.