Ferrofluid is a fascinating liquid that becomes strongly magnetized in the presence of a magnetic field. The composition materials of ferromagnetic fluid are nano iron powder, mineral oil, brine/pure water, which are non-toxic and harmless materials.
You can adjust the brightness of the speaker. At night, let the light it emits does not seem harsh.
Use the included magnets to control ferrofluid movement, fusion, and dispersion.
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Speaker; Power Cable; little magnet
What's the Ferrofluid? Two-stage backlight As A Stress Reliever Beats Like A Heart