$3.39
* LED Colors: Blue | White * Batteries: (2) CR2032, Replaceable * Dimensions: 3.5″ x 3.5″ * Printable: Yes * Weight: 0.097 lbs
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LED Colors: 2 Red, 2 Blue (They morph and combine to create a rainbow change effect) Dimensions: 3.5″ x 3.5″ Functions: Pressure-activated Color Changing Pressure Sensitive Drink Coasters come with 2 replaceable CR2032 Batteries.