Waterproof marine safety whistle quality Nexus (no Pee, no jams). Bright orange and ideal for all watersports including Scuba diving. Also an excellent whistle for walking, hiking etc. The whistle also has a built in belt clip. Extremely loud and easy to blow when cold / wet and capable of producing over 100 decibels of sound. This whistle meets the new safety standard ISO 12402-8. Quality nexus whistle.