This feature isn’t exclusive to the Leonoardo, as [Michael] explains in a build he sent in – the lowly Arduino Uno can also serve as a USB HID keyboard with just a firmware update.

Rather than be left on the wrong side of the divide [Stefan S] has come up with his own USB-C version of of an Arduino Pro Micro to avoid having to always find a different cable. Home made ...

Then, an Arduino ... The Uno R4 WiFi Has Extra Ans Upgraded Features The R4 WiFi is equipped with extra (and upgraded) on-board features you can't find on the Rev3, such as a Type-C USB port ...

Comparing the Arduino Uno and the Nano, you'll notice that the ... To use it as such, you need a USB cable and a 5V power ...