Not sureWhere can I buy that as as poster?
Looks great! Lots of good information on a small card.I've added a link to this thread on the Teensy 4.1 product page.
New Teensy 4.1 cards are also being printed. I'm waiting to update the website until we actually start shipping the freshly printed cards. But the info isn't a secret. If you want an early look, or want the print the new card yourself, here are the latest PDF files.