Genuine ACME BPA-Free Plastic No. 901 HELLOVA Hunting Whistle. 100-125 dBA long flat distance recall whistle. This whistle features a large funnel to easily double its effective range. SOLAS (Safety Of Life At Sea) approved - ideal for applications such as marine safety, exploration, athletics, climbing, walking, dog training, hunting, and any other use that demands a powerful whistle. Based on the classic ACME 660 whistle with a funnel to concentrate the sound. More than twice as loud as a conventional whistle, it focuses all the sound in one direction, demanding attention.