To activate your Halloween Candy Corn String Lights Necklace, remove the battery protection from the battery casing and press the button located next to it to activate THREE LIGHT FUNCTIONS: Fast flash, slow flash, steady light. Only every THIRD Candy Corn will light up. LED Colors: 8 Orange Necklace Length: Approx. 29″ Necklaces come ready to use with 2 replaceable CR1220 Batteries