ITEM NAME:Super Loud Safety Whistle with Wrist Strap for Boating Camping Hiking Emergency Description: Ultra-light, waterproof, durable and corrosion resistance Double chamber design to emits a shrill, high-pitched sound High power, it can be heard at long distances Wrist strap included, quick access clip for securing on the belt, kayak vest. Great for outdoor enthusiasts, search & teams and anyone who needs a safety whistle. Specification: Materials: Plastic Color: Black Whistel Size: approx. 75 x 18 x 14mm/ 2.95 x 0.7 x 0.55 inch (L x W x H) Unfolded Strap Overall Length: 50cm/ 19.7 inch Package Includes: 1 Piece Safety Whistle SKU: DMO0017477266003090.Great for outdoor enthusiasts, search & teams and anyone who needs a safety whistle. 1 Piece Safety Whistle. Ultra-light, waterproof, durable and corrosion resistance. Double chamber design to emits a shrill, high-pitched sound.