Any wall switch which is compatible with smart things, regardless of protocol, and regardless of whether it is Mains powered or battery powered, can control any other device which is controlled by smart things, whether that’s a in wall receptacle, another wall switch, a plug-in pocket socket, etc. 
The way smartthings works, the switch sends a message to the hub and the hub sends a message to the outlet.
The only issue here is what you mean by “a pair of outlets.”
As it happens, there was just a discussion about this earlier today: