Description: [Music Rhythm Lamp]: This Dancing Ferrofluid Music Rhythm Lamp is both a scientific decorative lamp and an lighting decoration. If the music is loud, the color of the lamp changes and the ferrofluid dances to the rhythm of the music. [Audio Visual Experience]: What this Fluid Speaker does is respond song audio or volume by driving ferromagnetic fluid, allowing it to selectively respond to high or low sounds. [Interior Decoration Light]: Just plug in and turn on the switch, easy to use. [premium]: Ferrofluid Speaker is made of premium pp material, which can be used repeatedly and has a long service life. [Holiday Gift]: The Ferrofluid Visualizer Lamp is premium for Christmas, Halloween or other holiday enthusiasts who science or home decoration, adding a sense of technology and color to their lives. Specification: This product does not contain batteries Size Chart: 11.5cmx11.5cmx7.6cm/4.53inchx4.53inchx2.99inch Package Includes: 1 Dancing Ferrofluid Music Rhythm Lamp Note: Please allow slightly errors 1-2cm differences due to manual measurement. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin