Electronic shaking dice All these problems are solved with this mini kit. Unlike its little brother (the MK109), you can activate this dice, not with a push button but simply by shaking it. Dice with seven bright red LEDs, shake before use. Uses a lithium battery (not included). Educational & fun Maker top seller Power supply: 3V-battery (CR2025 or CR2032) (not incl.) Dimensions: 36 x 36 x 32mm / 1.4 x 1.4 x 1.3", Manufacturer: Velleman