The Joy-Con controllers allow you to play in a variety of ways with the Nintendo Switch console.
You can use two controllers when holding one in each hand, or connect them to one full controller with the Joy-Con Grip.
Connect the controllers to both sides of the console to play in mobile mode, or split the controllers between two players to enjoy a multiplayer game.
Each controller has a full set of buttons that allows it to function as a full controller on its own, and each contains accelerometer and gyroscope sensors, allowing for motion control in each of the controllers.