This is the Douk Audio VM1: a ferrofluid visualizer with adjustable sensitivity and light that puts on a show when you play music around it. It has various knobs and buttons to change mode and other settings. This magnetic fluid visualizer has free beating, music, under 200Hz, and hover modes.
This gadget has 34 colors for you to choose from and 10 levels of brightness. It has a microphone and aux-in for your music sources.