To activate press the button located on the back of the cane below the battery housing. Light Up Candy Cane Necklaces have three light functions. Set the lights on a random light flash, have all the LEDs blink at once or an up an down flash. Note: The lanyard does not light up or flash, it is a red nylon. Dimensions: Candy Cane: Height: 4.75 in. - Width: 2.37 in. Lanyard Length: 30.50 in. LED Colors: White and Red Batteries: Includes 3 replaceable AG13 batteries. Specifications LED Colors: White & Red Batteries: (3) AG13, Replaceable Lanyard: 30.5 in. Candy Cane: 2.37 x 4.75 in. Printable: Yes