It IS a UHD player. Go to the product page and let Google translate it:
"Ultra HD Blu-ray movie playback compatible drive
※Ultra HD Blu-ray playback software is not included.
With compatible PCs, playback software and displays, you can enjoy immersive images with enhanced dynamic range and rich color gamut in addition to 4K images that are higher definition than full HD.
Of course, you can also play Blu-ray movies and DVD movies.
You can download the Ultra HD Blu-ray Advisor Tool on your PC for the PC environment."
UHD Support on a PC under Windows is a slippery slope of no longer supported hardware - at least in an official sense. According to the Blu-ray Forum (the official source of the Blu-ray standards) official UHD playback requires Intel's, now no longer included with new Intel processors, SGX (which turned out to be a train wreck of hardware security issues) "Software Guard eXtensions", and only Cyberlink's PowerDVD supported it - but not anymore. You can see Cyberlink's
requirements here.
I don't know that this drive will be compatible, but if you have a "compatible" drive (that can be flashed with unencrypted firmware), a combination of MakeMKV and AnyDVD HD could possibly support UHD playback. I won't get into specifics other than what I already said, but those details can be found on the AnyDVD HD/MakeMKV forums if you care to look.
IMO, the Blu-ray forum, with such restrictive requirements, is just shooting UHD Blu-ray in the foot. There are lots of people out there, myself included, that would buy a PC/Windows UHD solution in an instant if the hardware restrictions were not so stringent. In fact, those hardware restrictions, because of a flaw in SGX, might just lead to someone cracking AACS 2.X