Navigate to > Controllers and Sensors > scroll to the bottom and select Disconnect Controllers . (Hold the 'X' button on your attached Joy-Cons to clear out cached third-party Bluetooth data).
Based on general documentation for similar devices, some controllers can be updated via USB flash drive. This process usually involves: n-sl wireless controller firmware update
is a generic third-party device—meaning it isn't made by Nintendo—it usually does not update through the standard "Update Controllers" menu on the Nintendo Switch console. Instead, you generally need a Windows PC and specific updater software from the manufacturer to apply a firmware fix. Phase 1: Update via the Nintendo Switch (Easiest Method) Navigate to > Controllers and Sensors > scroll
What (Switch, PC, iOS) are you trying to connect it to? Share public link n-sl wireless controller firmware update