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【Ferrofluid Sound Visualizer】 Watch As Ferrofluid Dances In Real-Time With Your Music Or Ambient Sounds. This Magnetic Display Is Powered By A Built-In Microphone That Picks Up Sound Vibrations, Offering A Fluid And Fluidly-Reactive Audio Experience That Is Both Visually And Sonically Stunning 【Design Inspiration】 Ferrofluid is known as the archetypal substance of the Marvel movie Venom. The purpose of the design is to make the ferrofluid in the glass bottle rise with the external sound rhythm and music, so that the sound/music can be visualized 【Working Principle】Built-in MIC , magnetic fluid speaker can accurately capture the frequency of external sound vibration and transform it into a beautiful dance of ferrofluid. This magnetic fluid speaker is designed to provide instant and visually stunning response to your listening environment 【Product Material】 Round metal shell, high-definition borosilicate glass, nano iron powder, pure water, environmentally friendly and non-toxic. Built-in MIC, white LED backlight, no need to connect any wiring to use, built-in battery, fully charged can be used for 6-8 hours. It is a reliable source of entertainment, party relaxation 【Note】 The ferrofluid speaker is without speaker will not emit sound, The original design of our product will retain bubbles of different sizes, and the bubbles are used to buffer the pressure inside the glass bottle and prevent the glass bottle from breaking, clear do not use this product in high temperature or extreme cold weather, otherwise it is easy to cause the glass bottle to break