Devices are objects in Fortnite that perform specific tasks intended to control gameplay.
A device, like a prop, is something you can place on your island. But devices are different from props in that you use them to create player interactions. Different devices do different things, but they all do something.
Think of a device as a package of game mechanics with specific features that can be customized to support your gameplay. Most devices can be customized, but all of them have default settings that determine how they behave even if you don't customize them.
In Verse, a device is the basic building block used to construct game mechanics. A device drives player interactions that control gameplay.