One of three different devices

Samsung is providing these dock in three versions: a version as rack with simultaneous charging function, a variant with additional multimedia terminals and a third type for charging a single battery.
Why this is so, probably know only the product developers in South Korea. Those probably know the answer to the question of the missing power cord. That such is not supplied, but is fortunately in the product description.
I am satisfied with the acquired unit, who, however, still wants to charge a spare battery, hold still requires an additional charger.