ACME Whistles 901 HELLOVA

Weather and shatter proof. S.O.L.A.S Approved. Ideal for applications 
such as: Marine use safety, exploration, athletics, climbing, walking, 
dog training and any other use that demands a HELLOVA WHISTLE.

More than twice as loud as a conventional whistle. Focusses all the 
sound in one direction, demanding attention. Doubles your reach.