Light up St. Patrick's Day with our LED Shamrock Pendant Necklace. Watch the green LED's illuminate this clear plastic clover necklace in a bright and unique way! Press the on/off button located on the rectangle above the pendant to select from 3 different light modes; fast flash, slow flash and steady on. green LEDs light the necklace and the large pendant. 2 CR2016 Batteries are included and installed. Each shamrock pendant medallion is 3" x 3".