I think this ad is kind of misleading. “Werewolf ring” makes me think of a ring that a werewolf wears, or a ring you wear in order to turn into a werewolf. And what does it mean by the “secret club” comment?
Werewolf Siren Ring
It’s a ring! It’s a siren! Blow into it and it sounds like a police car. Sounds like cry of werewolf, too. Great for fans and secret clubs. Only 75 cents plus 39 cents for postage and handling.