https://www.gamespot.com/articles/new-nintendo-switch-nes-controllers-restricted-beh/1100-6461768/

During Nintendo's September Direct, the company announced a new Joy-Con controller for Switch. These new Joy-Cons are shaped like NES controllers, and you'll only be able to buy them if you're an online subscriber.

The new controllers have the same Joy-Con bluetooth connection, so you'll be able to play wirelessly and charge your controller by connecting them to your Switch or a Nintendo charge station. That being said, you can't use the controllers while they're plugged into your Switch, so you can't use them in handheld mode. Two controllers, a right and a left Joy-Con, are sold in each box for $60. Shipments of the controller begin in mid-December 2018.