Your entry point to It's a Small World's YouTube channel of curiously haunting covers of pop songs performed on bleepty calculators.
That model of musical calculator (are there others?) doesn't seem to be available anywhere; all I found was a dead product page on Ali Express.
Chiptunes not your thing? Here it is on cello, by 2cellos.
https://www.youtube.com/watch?v=D9LrEXF3USs
