There are several official controllers designed for the Nintendo Switch. There are the Joy-Cons that come with the Switch, then there is the Pro controller, and then there are more “fun” controllers like the replica SNES controller. But now it looks like there might be yet another model introduced to the lineup.
According to a report from Vooks, they stumbled across an FCC filing which suggests that Nintendo could be working on a new controller for the Switch. The device in question has the model number HAC-043, making it one number higher than the SNES controllers which had the HAC-042 model number.