Vintage Thunderer brass whistle. Made in USA. Classic design. Great to put on a cord necklace. Whistles are great for sports and games, outdoors and survival, dog training, and therapeutic and developmental purposes. They are used by referees to signal, coaches to command, and outdoor enthusiasts for signaling and hunting. For therapy, they help with oral motor skills like breath control, while their loud, piercing sound makes them valuable for emergency situations to attract attention. Smoke-free home. Unisex.