To activate your LED center piece, slide the button on the bottom of the base. Fibers & base will slowly transition from color to color through the rainbow. NOTE: Some simple assembly is required. Dimensions: Height (Includes Base): Approx. 14.0 in. 35.56 cm. Width (Includes Base): Approx. 18.0 in. , 45.72 cm. Stand Height: Approx. 3.6 in. , 9.14 cm. Stand Width: 3.25 in. , 8.26 cm. Party Centerpieces LED Colors: 1 Blue, 1 Jade, 1 Red Fiber Optic Party Centerpiece includes 3 replaceable AA Batteries.