This is a split-flap, and it’s a charismatic artifact of media history :)
wordsinspace.net/2020/12/03/f...
wordsinspace.net/fluttering-c...
Fluttering Code: A Cultural and Aesthetic History of the Split-Flap Display
Words in Space is the work of Shannon Mattern.
We got one of these things for the office and every time the newest headline alarms me anew.