Can anyone identify this? I don't think it is a calculator.
Sean bidded on it but didn't win.

PCB label: (8)FJ, PB-074, MADE IN TAIWAN 80-210089
MCU: Fujitsu MB8841
45 buttons (9*5)
7seg leds above, on-off switch below
has a piezo speaker

https://www.ebay.com/itm/334021498783?ul_noapp=true&nma=true&si=jshu7zJTzcPIJr1NUGfQwL%252F%252FC%252F0%253D&orig_cvip=true&nordt=true&rt=nc&_trksid=p2047675.l2557