Listen to the  Acme 558 Thunderer Whistle.

The Acme 558 Thunderer Whistle is the largest of the 3 Thunderer Whistles and is made of compression molded black plastic.  The Acme 558 Thunderer has a deep tone and produces a loud ranging whistle.  The 558 is made from tough and bite resistant polycarbonate offering longer life than standard plastics.

In every one of its 15 decades, so far, ACME has invented and patented a new and unique whistle that has continued to move the industry forward. From the first sports referee whistle in 1884 to the Hellova Safety whistle in 2014, ACME remains unequalled in any field you choose.