The principle of this product is RGB (red, green, blue) seven colors, gravity sensor key light, flash cycle method. Transparent part is acrylic transparent. Install battery start (without battery).
Use steps: Put on the battery, on the table --- Put on the cup --- coaster shine --- Remove the cup --- coaster off
Product Size: 2 * 9.5cm
*Note that depending on your monitor settings, colors may vary slightly from picture. Please allow for slight deviation of colors and sizing.
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