On Day of the Dead you don’t want to be dull, On Dia de los Muertos get a flashing sugar skull. To activate your Day of the Dead Blinking Skull, remove pull tab and press button on back of the pendant. Lanyard comes with easy breakaway connector. LED Colors: 1 Red, 2 Yellow, 1 Blue Skull Dimensions (W x H): 1.6″ x 2.23″ Comes ready to use.