The Storm Safety Whistle is not great just for divers but for anyone who needs to be heard in an emergency.

Features of the Storm Whistle include:

• Can be heard underwater up to 50ft
• Unique patented design allows it to be heard even under water
• Sounding chamber forces all water to be purged when the whistle is blown
• The Storm whistle is twice as loud as any other mouth-blown whistle in the world
• Survival bright yellow color, orange, or black
• Creates a clear, high frequency sound, with a power rating over 75% greater than other referee and safety whistles
• The Storm All-Weather Safety Whistle is the loudest whistle in the world
• It's perfect for divers, lifeguards, SAR, and for recreation
• Creates a clear, high frequency whistle sound, with a power rating over 75% greater than other safety whistles or referee whistles
• Dual chamber quickly purges for uninterrupted sound
• High-impact thermoplastic
• Even for someone who is short of breath. Responsive - Emits the loudest sound with minimum effort
• Adopted by the US Military, police and security forces worldwide!

Be safe, be found. U.S. Military approved. The Storm Whistle is a must have for any emergency situation when you need to be heard.