To activate your Color Change LED Drink Glasses, first assemble the cup, stem & base together. This is neccessary to provide you the safest & cheapest shipping possible. Next press the button on the bottom of the base. Set the glass on 1 of 7 individual colors or set it on a rainbow transition from color to color. Dimensions: Height 6.95 in. Width 3.18 in. Volume 8 oz. LED Colors: 1 Blue, 1 Jade, 1 Red Light Up Wine Glass with Long Spiral Stem includes 3 replaceable AG13 Batteries.