Compact and reliable, this Low Profile Safety Whistle is a must-have for scuba divers, snorkelers, boaters, and watersports enthusiasts. Designed for marine and dive safety, the high-output whistle delivers a loud, clear signal in emergencies, making it easy to attract attention above water or on the boat deck. Lightweight and corrosion-resistant — perfect for attaching to dive gear, BC harnesses, key rings, or safety kits.