We exclusively used Jabra speakerphones at my last few offices and I have a few at home. They work very well and I've never seen them have a single problem.
Sketchy? Jabra is arguably the industry leader in hands-free audio, producing this stuff since 1983. It was the brand you buy to use with your phone when driving a car before "true-wireless headphones" was even a thing.
> It says right on the product page what connectivity the device supports.
I don't really see anything there beyond "bluetooth support", and it seems to me that expecting very common systems such as macOS and Windows would work is pretty reasonable.
It just says "devices". Turns out there's a second section on that chaotic page which mentions "mobile". I did check this before, and it's not mentioned anywhere else, including in the datasheet and specifications PDFs. It's only in one of the "connectivity" section with a vague unclear ambiguous singular "mobile device" mention, which contradicts other parts of the same site.
I don't think they're trying to fool customers on purpose, but it's extremely unclear what exactly you're buying and many sections would lead you to believe that it will work on any Bluetooth-capable device, just like pretty much all Bluetooth devices do. I think this is basically false advertising due to incompetence.