The dual-frequency whistle can be used to signal for help or attract attention in outdoor emergency situations. Suitable for marine, water sports, kayaking, boating, swimming, surfing, sailing, fishing, camping, hiking, hunting, and other outdoor sports.SpecificationColor: BlackMaterial: PlasticOverall Size: 7 x 2 x 1.5cm / 2.7 x 0.8 x 0.6 inch (L*W*H)Packing List: 6 x Emergency WhistlesAdvantage1. Made of plastic material, a curved structure, is strong and durable.2. Compact and lightweight. Easily fits onto a keychain or backpack, making it easy to carry.3. The surface is smooth and bright for color formation, which is not easy to fade, exquisite, and beautiful.4. The double-frequency whistle blows easily, providing a louder and clearer sound, that can be heard from a far distance.5.

The dual-frequency whistle can be used to signal for help or attract attention in outdoor emergency situations. Suitable for marine, water sports, kayaking, boating, swimming, surfing, sailing, fishing, camping, hiking, hunting, and other outdoor sports.SpecificationColor: BlackMaterial: PlasticOverall Size: 7 x 2 x 1.5cm / 2.7 x 0.8 x 0.6 inch (L*W*H)Packing List: 6 x Emergency WhistlesAdvantage1. Made of plastic material, a curved structure, is strong and durable.2. Compact and lightweight. Easily fits onto a keychain or backpack, making it easy to carry.3. The surface is smooth and bright for color formation, which is not easy to fade, exquisite, and beautiful.4. The double-frequency whistle blows easily, providing a louder and clearer sound, that can be heard from a far distance.5.