This is an old-fashioned telephone, transformed into a switch. It is connected via wires, and the computer. With the press of any number key, musical sounds emit from said buttons.

GIPHY lets you make an animated gif out of anything on the screen

https://docs.google.com/spreadsheets/d/1GgTgPg3LusL5MF6ifNLrmdmPIlUb7flyCe81MYKNIEI/edit?ts=58dd2362#gid=1678793135