Definitely SRAM like.
They have the same pairing buttons behind the paddle.
There is a battery on the front derailleur.
It looks the rear derailleur can be charged too, but the battery looks to be hidden behind in the pictures, or very small.
I think having read somewhere SRAM had a patent on having the batteries on the derailleurs, making them the only one 100% wireless. Forcing Shimano to have a wire between the derailleurs, or there is another reason?