10 Pieces Emergency Whistles Safety Survival Whistles High Pitch Double Tubes Metal Whistle for Outdoor Camping Hiking…


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Louder sound: double tube metal whistle is loud and easy to blow; This emergency whistle can provide up to 120 decibels of sound, which can be heard for far distance, also great choice for referee and coaches
Water-resistance: these survival whistles are made of aluminum alloy, sturdy and durable, with good airflow design can be applied in rainy day, humid weather, most environment and weather

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