Ferrofluid has quite a history. It was invented by Steve Papell to address the problem of moving rocket fuel in zero gravity environments. These days ferrofluid is used in many fancy toys, including sound visualizers and speakers. Take the SoundFlux V2 for instance: is is a 30W HiFi speaker with RGB light and 15W wireless charging. It not only has Bluetooth connectivity but also has TF card and USB support.
This ferrofluid speaker has a bunch of buttons on top of it that lets you turn it on/off, increase/decrease volume, and change other settings. Like many other ferrofluid speakers, this one also comes with a tiny handheld magnet. The SoundFlux V2 is made with borosilicate glass and ABS plastic construction.
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