To activate your Glam Cube, press the button on the bottom of the cube. You can set the glam cube on a flash, blink or steady light function. Height: 1.25 in. Width: 1.5 in. LED Color: Blue Batteries: Batteries come ready to use with non-replaceable batteries – cubes are permanently sealed for waterproof safety. Note: Glam Ice Cubes are not freezable.