The distance from the wall wart to the camera can be up to a the max length of a USB cord. I’ve run V2’s with a 26 foot USB cord. ( and posted my results on the forum last spring or early summer but the search feature is so poor I can’t find the posts).
Remember - all USB micro cords are NOT created equal. I have even run 2 V2’s with 1 at the end of a 26’ extension and the second pair pulling thru the first with a SHORT USB cord. Couldn’t run 3 at a time off even a “high power” wall wart at 26’.