The other answer to this question is incorrect! EMR pens do NOT work with the Acer Spin 713 Chromebook. (The Acer Spin 13 Chromebook does work with EMR pens, though that is a different model!) This Acer 713 is designed to work with USI pens. Unfortunately, no USI pens are available now. Only HP has released one (a USI pen) and it is both out of stock and hard to find anywhere. Eventually, several companies are supposed to sell USI pens - but not yet. This is a great Chromebook nonetheless!