you could damage your typing nerves pretty quickly with a few milliamps at 50,000 volts. The main brain of this pain trainer is a Particle Argon board which has I/O pins that can be controlled ...
or try it for free in Setapp. Learn more about all of KeyKey’s features at the KeyKey Typing Trainer website! P.S. You have a chance to win a free copy of KeyKey ($9.99) in the KeyKey Facebook group.