Whistles are portable signaling devices that create a loud, high-pitched, shrill fluttering sound that stands out against background noise and can be heard over long distances. They help rescuers locate a lost person in dense foliage and other low-visibility circumstances.

Whistle chains connect to compatible whistles, retain them in place when they are not in use, and keep them attached to the user in case they fall from their mounting location.

Whistle hooks provide a visually appealing place to hang whistles when wearing dress uniforms.