 It is the Slider Trinky. It can act as a MIDI device, a USB HID keyboard, mouse. This is a little laptop of mine and I have some DJ software running on here. This software I'm using is able to be configured to look at a MIDI input for moving that crossfader around. And what I can do is use the slider here to crossfade between it is the Slider Trinky. It is a fader on a USB stick and it has a couple of underlit neopixels as well as a capacitive touch button on it. And it runs circuit python and Arduino on the Cortex M0 that is built right on there.