The DMG states donning the Monk's Belt, if not a monk, ". . . grants the AC and unarmed damage of a 5th-level monk. This AC bonus functions just like the monk's AC bonus." Is this just the +1, or does the wearer also get their WIS bonus added to their AC, as a monk would?
For that matter, what kind of bonus is the monk's bonus to AC?
The DMG states donning the Monk's Belt, if not a monk, ". . . grants the AC and unarmed damage of a 5th-level monk. This AC bonus functions just like the monk's AC bonus." Is this just the +1, or does the wearer also get their WIS bonus added to their AC, as a monk would?
Yes, but remember they wouldn't be able to use any armor or carry a shield or they would lose the AC bonus (just like a monk).
For that matter, what kind of bonus is the monk's bonus to AC?
It's untyped, so it stacks with everything and always applies.