I couldn't find the software / drivers to go with my Victsing PC109A mouse anywhere.
I did
eventually get a download link from via their support form but it was hosted on a Baidu
webserver
that was capped at 10 kb/s. So I am providing the software / driver for download here.
VicTsing Pro RGB Gaming Mouse Wired / PC109 / PC109A software:
The software lets you edit the DPI values attached to the different settings,
set
the speed at which the light effects change, select the polling rate, choose
what the
different buttons do, etc. Unfortunately, there does not seem to be any option for
controlling
brightness or selecting colors for the LED cycles.