In the 1890s Tesla demonstrated light bulbs without wires and wireless remote control. And he was only getting started.
He was exceptional at inner work as can be seen in his writings and that allowed him to test and refine his inventions in the mental space without requiring any prototypes
For example:
"The images I saw were wonderfully sharp and clear and had the solidity of metal and stone, so much so that I told him: "See my motor here; watch me reverse it."