To activate your Tall Frosted LED Beer Stein, push the button on the bottom. Choose one of the 7 different still colors or set it on a cool slow transition from color to color. NOTE: Never put lighted glass in the dishwasher. Gently hand wash ONLY & keep moisture away from the base to avoid contact with batteries. "Glasses" are made of high quality acrylic that is FDA approved. Dimensions: Height 6.75 in. Width 4.5 in. including handle Diameter of Brim 3.12 in. Volume 20 oz. filled to brim LED Colors: 2 Blue, 2 Jade, 2 Red Includes 4 replaceable AG13 Batteries.