World's loudest whistle. Blown and heard on land, up to 1/2 mile, and even underwater, up to 50 ft. A non-corroding thermoplastic housing is easy to grasp, and the double chamber design allows it to be blown when held right side up or upside down.

• Product Dimensions- 6" L x 4" W x 1" H
• Performance in any weather or safety situation due to unique dual chamber design
• Works underwater up to 50' and excellent for scuba divers
• Easy to grasp housing
• Plastic
• Wipe Clean
• Made in USA