You can attach "Joy-Con (L)" and "Joy-Con (R)" and use it as a grip type controller.
Unlike the "Joy-Con Grip" that comes with the Nintendo Switch main unit set, you can also charge the "Joy-Con" while playing using the included USB charging cable or Nintendo Switch AC adapter, so you don't have to worry about running out of battery. there is not.
"Joy-Con" is not included with this product.
To use it with Nintendo Switch Lite, you need to prepare Joy-Con separately.