Novus radio is a type of communication used by People of Novus.
To activate it, you have to press a button. And its shape is square and small. And exactly how the distance of the radio is unknown.
In 2010 Matthew Scott and Ronald Greer explored a planet and discovered two people who told them that Scott and Greer were their ancestors. And when Camile, Chloe and Eli traveled to the planet and when Jason and Ellie would show the way to the settlement so Jason said he would call the settlement and tell them that they are coming. (SGU: "Common Descent")