To activate your Glam Cube, press the button on the bottom of the cube. With each push, see 7 different LED color combinations plus 1 rainbow slow-change function that morphs from color to color. Length: 1.62 in. Width: 1.25 in. Depth: 1.0 in. LED Color: Rainbow Batteries: Batteries come ready to use with non-replaceable batteries – cubes are permanently sealed for waterproof safety. Note: Glam Ice Cubes are not freezable.