How... does this even work? How does a blind person construct an electrical circuit? How can they see the colors to determine a resistor, or read the capacitance on the side of a capacitor, or feel the little tiny circle that indicates which pin of an IC is pin 1? Or even just which wire is red and black?

I suppose this multimeter is the answer to which wire is red and black (is the voltage positive or negative). But I wonder about those other things.

I'm honestly just curious. And I feel bad for blind folks in one more way now.