What is Regulator Display Complication in Watches?

Kinldy describe it's function.
on a regulator you have the hours which are indicated on a different
08/16/2010 - 12:11
subdial. The emphasis is given on the hours which are indicated by a central hand. Currently VC has two regulator display watches: Malte Dual Time Regulator scan courtesy of 1907Malte Tourbillon Regulator (this is the special Boutique edition)