Loud, shrill, dual tone is audible from great distance (farther than your voice).

Pea-less, lightweight and small.

High impact plastic housing.

Lays comfortably flat against your chest when worn on a neck lanyard or fits very comfortably in a pocket.

Will work in the rain!

Complete with 18 in. of lanyard.

Developed for the U.S. Navy; used by NASA, major airlines and shipping companies (so good enough for Fido, huh?)

Orange, 1.0 x 2.0 x .25 in., 1.4 oz.