Wear our shamrock necklace or with a pinch you’ll be struck. Instead you’ll get a hug and a kiss for good luck. Instructions: Shamrock Charm Necklaces with Light Up Cloth Lanyard have three light functions, set the lights on a quick flash, a slower blink or a still light. Both the smooth Acrylic Shamrock and Fabric Lanyard light up. Simply press the buttons for activation. Note: The lanyard has “Happy St. Patrick’s Day” imprinted down both sides in black. Shamrock Depth: 1.25 in. , 3.17 cm – Shamrock Height: 4.37 in. , 11.09 cm. – Shamrock Width: 3.50 in. , 8.89 cm. – Lanyard: Length: 28.00 in. , 71.12 cm. – LED Colors: 11 Jade – Includes 3 Replaceable AG13 Batteries for each component.