To activate your LED Happy New Year Charm Necklace with Lightup Lanyard, remove the plastic tab and press the button multiple times to rotate through the flashing patterns. Activate the charm separately by removing the plastic tab and pressing the button multiple times to rotate through the flashing pattern. 7 flashing modes that can be selected by the user. Strobing, color changing, steady on, blinking blue, red, green and more! Comes ready to use with AG13 Batteries. Batteries are replaceable.