No more than two wireless controllers can be paired to a Nintendo Switch console while a Bluetooth® audio device is connected.
What to do
Ensure that your console has the latest system version.
From the HOME Menu, select Controllers, then Change Controller Grip/Order.
Press and hold down the SYNC Button on the controller(s) you want to pair for at least one second.
Press the L and R Buttons or SL and SR Buttons at the same time on the controller(s) you want to use.
While using a Bluetooth audio device, up to two controllers can be paired.
Situation not resolved
If you are still unable to pair one or two controllers, follow our troubleshooting steps for the type of controller you are trying to use.