identify Shimano Hollowtech 2 Bottom Bracket

how to identify SHIMANO HOLLOWTECH 2 BOTTOM BRACKET (outboard type).
this is my info (from google gemini, google search etc).
my expertise : not much.
Dunno if all Hollowtech 2 are outboard bottom bracket bearing system.
Seems like a good crankset type to me.
The claimed advantages sound plausible, plus it's really easy to remove.
Hollowtech 2 does need 2 unique tools.