Q : Does it work with wireless controllers ?
A : Brook converter is Bluetooth wireless connection.
Playstation 3 and 4 controllers are Bluetoorh wireless connection; therefore, they can be used wirelessly.
Q : Can I use this converter on WiiU?
A : By flashing the PS3PS4 to WiiU firmware, you can use this converter on WiiU.
To use back on Switch, flash the PS3PS4 to Switch firmware.
Q : Can I use an OTG connector to connect the converter directly to Switch?
A : Technically speaking, you can do that.
However, it can be unstable, or can disconnect since power is only from Switch.
It is still suggested that the converter be connected to Switch dock to use.
Q : When I connect the converter to the Switch dock, Switch suddenly shuts off with a black error screen
A : Before you connect the converter to the Switch dock, make sure you have turned on "Pro Controller Wired Communication" in System Settings on Switch.