Backpacking Whistle - Extremely Loud

It is not easy to find to buy a good Emergency Whistle for Outdoor Survival so I made my own Extremely Powerful Whistle !
You can use for your safety to scare animals or in case of emergency, have an awesome adventure and leave no trace.

OBS!!! Be warned to protect your ears (this whistle is incredibly loud and has a randomized frequency - output about 135 decibels)

I will be happy to see your makes and comments!

You are welcome to follow me on my adventures:

Adventure Is Awesome - YouTube

If you don't own a 3D printer and want this thing

eBay item:266677797016

ᵢ❤ₗₒᵥₑ CₒFFₑₑ

Donera (paypal.com)
 

Easy to print NO support needed!