N64 BlueRetro Controller Receiver with Memory Pak (Original Grey)
Retro-Bit Tribute 64 2.4 GHz Wireless Controller for Nintendo 64 (N64), Switch, PC, MacOS, RetroPie, Raspberry Pi and Other USB Devices - Classic Grey - Walmart.com
This DIY kit lets you use an old Nintendo 64 controller wirelessly with the Switch - The Verge
RetroWireless: Adattatore joystick wireless per console N64 - RetroGameStation - Old Spirit Arcade
Nintendo 64 controller - Hardware - Nintendo Official Site
Wireless N64 Controller for Nintendo 64 / Switch/ Mac Windows+USB & N64 Receiver | eBay
Admiral Bluetooth Controller For Nintendo 64 - Hyperkin - Stone Age Gamer