This simple accessory will let you sound off whenever you want and is a must for any girl who wants to call out a foul or judge a penalty this Halloween. Your ruling will be heard loud and clear, when you have this safety whistle when you go out on Halloween. The whistle has a metal loop that is easy to wear on a necklace and will attach securely to your key chain. Pair this accessory with one of our referee or police officer costumes to lay down the law or rules of the game.