Ableton Push 3 controller. Designed to give Ableton a physical interface more functional than a mouse.
Brand new in box. Never used, never connected to my computer, never registered. I bought it thinking I'd use Ableton for making music, but went a different direction. So, it's been sitting in my studio in a box for the past six months.
You can upgrade to a standalone Push 3, that allows you to operate without the computer.