 It is the Feather RP2040 USB host. Rather than plugging in, let's say your mouse or your keyboard straight into a computer, you can use a microcontroller, this one right here, to intercept that incoming USB and do stuff with it. We have one core of the two and both of the PIOs doing all of the USB host duties that leaves the second core for everything else. Take mouse information and apply some logarithmic filtering to it so that it actually slows down the cursor movement when you move the mouse quickly. Mouse slowly left and right, it's moving, that kind of what I would consider a sort of normal mouse pace. But now if I move the mouse quickly, it actually slowing it down. It's actually making a little bit more accurate, which could be really useful as an assistive technology device. If you have a bumpy ride, you're on the train. It is the Feather RP2040 with USB host.