2KM Long Range RF link kits w/ encoder and decoder

Hi all. So I am extremely naive when it comes to electronics, especially IC stuff. With that being said (and the laughter about to begin) do you have to control these with some sort of outside component (Arduino, etc) or can these be controlled by a simple analog signal?
I am trying to make a very simple switching system that turns on and off a light, well a relay to a light. I am looking to control the transmitter with a 5.0v signal, and then use the receiver output signal to cycle a relay (transistor maybe?)
If anyone knows whether this stupid question is possible or not, I’d greatly appreciate it, I’m about to start pulling my hair out over here!