|MAX7219 controller (DIP) with pluggable 8x8 red LED matrix display and jumper leads|
An 8x8 red LED dot matrix, driven by a DIP MAX7219 on a separate, pluggable board. The boards can be daisy chained to make larger displays and are controlled via a serial bus.
The onboard right-angle pin header for power and communications is next to the MAX7219 IC (see photo). It is supplied with a short length of ribbon cable with female DuPont headers at either end, for connection to your microcontroller board.
See the article in the June 2017 issue, titled "El Cheapo Modules, Part 7: LED Matix displays".