Much like beacons equipped with speed modules - increase the construction speed (and similar parameters) of structures. They do not require modules to function.
Mods introducing new content into the game.
Version: 1.0.2 - Updated to reflect changes in the new version of Factorio.
Version: 1.0.1 - Extravagantly changed the digit 0 to 1 in the relevant version of the game.
Version: 1.0.0 - Meow.