The afterglow replay is a mini PCB which can run the attract mode of a Williams Tales of the Arabian Nights pinball machine. It is pure decorative and serves no real purpose :-)
See a video of the board in action:
The board can operate from 3.3V-5V directly.
The Atmega328P must be fused as follows: lfuse 0xff, hfuse 0xda, efuse 0xfd.