The Federal Sign and Signal Model WL 12 volt siren is a vintage piece of American-made equipment that exudes a classic Federal style. This siren, crafted by the reputable Federal Sign and Signal maker, is a unique single unit that would make a great addition to any antique collection or vintage decor. With its nostalgic design and history, this siren is sure to be a conversation starter and a valuable piece for any collector of American antiques.

   I don't know if this is 6 volt or 12 volt, therefore I'm afraid to test it.