The Nintendo Switch Lite is the new, cheaper, and more compact console that is designed to be handheld only. Because of this, all its controls are integrated into the device. 

The detachable Joy-Cons of the Nintendo Switch allow the console to be more flexible, be played by multiple players and via a stand or TV. This provides a more traditional at-home gaming set-up, but the console is still relatively small and can be played in handheld mode, if you do want to play while you’re travelling.