NRS Storm Whistle
Source: bought it new
Woah, if you are lost in the woods and need someone to hear you, well this is the small piece of plastic for you. I mean, yeesh, even at a minimum amount of air will this thing amplify! Your ears won't be happy, but you will get rescued (probably).
Price Paid: $5.50
Super bright orange whistle. I had to plug my ears when I blew it full blast.
Where to Buy
Here's what other sites are saying:
Sometimes, the only way to be rescued is to be heard. Invaluable for signaling rescuers. Boat safely and carry the necessary equipment. 2-level volume in a sturdy, loud whistle which can be heard while under water. Comes with Split-ring. Size: 3.25"L x 1.75"W
Sometimes the only way to be rescued is to be heard. The Storm Safety Whistle is invaluable for signaling rescuers. 2-level volume in a sturdy, loud whistle.
- Altrec Outdoors