Irish Shamrock Blinky LED Lapel Pins are the St. Patty's Day blinkies you've been waiting for. Party with the luck of the Irish this (and every) March 17th with Shamrock Flashing Body Lights, the perfect promo for bars, pubs, restaurants, clubs and festivals. To activate your Shamrock Blinky Pins, remove the battery protection & press button on back. To attach, St. Patrick's Day Pins come with safety pin attached. Irish Shamrock Blinky LED Lapel Pins come ready to use with 2 replaceable CR927 Batteries.