Features

Can have "shades" algorithm, where you set the default outdoor tint level. It's not really for brightness purposes though, but rather for others to not see your eyes. Also transition algorithm, where fast changes of overall brightness are adjusted quickly, and slowly adapts your pupils. "No eye pain" or something

Can verify genuine product when doing a firmware update? Check CPU id? Or don't bother, not sure. Port USB to small arm chip? Or maybe someone else has it and you can port