Help with an UV code

[PonyoBellanote]

I recently bought the Spider-Man Legacy Collection boxset from the UK, the 4K version. I'm in Spain. The edition includes a Digital HD Ultraviolet code.

Since I need money (even if it's not much) was wondering if I could sell it, but I've no idea what's included with the code, versions, where would they be available, etc, is it region locked, etc. Need to know these details if I want to sell.. no way to know unless I redeem it and that'd mean it'd be useless to buy. Any help?

I need to know if the code is region locked to UK or it can work with the US, since I'm more likely to find someone interested there. And if so, how, what are the ways, and what exactly will be included, will it be HD or UHD too?