Overview video: https://www.youtube.com/watch?v=uE3FbmMKl-U Connection guide (and history): https://www.youtube.com/watch?v=WcB8032SWHI WINDOWS v1.1 FIRMWARE UPDATER ...
Expect them to cost an arm, leg, and most other body parts ...
Various other boards can be supported if they have Arduino core available with SPI library with minimal or no editing to the sketch. Some Arduino boards use 5V logic and are not recommended.
Thankfully, the Arduino board is one of the most popular electronics platforms across the globe, so there's definitely no shortage of documentation online. But if you don't want to manually hunt for ...