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SOS Anodized aluminum micro whistle keychain by Wazoo

SOS Micro Whistle™

6 reviews Regular price $5.00 Save $-5.00
86 in stock


Purse your lips around the WAZOO and blow. That's all there is to the finished product!  But it's the story of design and development behind this little screamer that makes it a must-have for every kit and keychain.

There was not an existing whistle on the market that could live up to Wazoo's stringent requirements. They were too bulky, not loud enough, had parts that would fail, or were insanely expensive because they were made from Titanium. In a months-long experiment of compressible fluid dynamics, we tried every tube diameter, chamber length, hole opening angle, and cut depth.  Each variable was tied to the next and as a group, they controlled the pitch, volume, ease of use, and ability to "over-blow" and max out the whistle.  This SOS Micro Whistle™ is the culmination of all that research. It is balanced on the razor's edge of usability, functionality, and compact size. 

  • Dimensions: 8.5mm diameter x 43mm long   (~0.33" x 1.7")
  • All Aluminum construction (no plastic here!)
  • Wide range of function - Starts resonance at low flow (good for kids) and can't be over-blown (good for adults)
Customer Reviews
4.8 Based on 6 Reviews
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United States United States

Great little whistle- fits in the hat, on my key ring and in other little pockets! Thank you!

Ivan I.
United States United States
Loud for its size!

The whistle is of a very convenient size and can be carried anywhere easily. I attached it to my EDC necklace to have handy for emergencies.

Maxime L.
France France
Pretty strong sound and easy to blown in !

Full metal construction. A reall nice deal again ! :)

Paul R.
United States United States
SOS Micro Whistle

I tested it (with a friend about 75 feet away and around the corner of the building) and it was as loud or louder than the other whistles I had. Interestingly, the "normal" size whistle was less loud. Super light. You might want to attach a small colored ribbon to it. It seems it would be pretty easy to lose/

Maxime L.
France France
to have in your pack !

ultra light and powerfull ,lifesaver.

Roberto C.
United States United States
The SOS Micro Whistle

Good size fits in my hat, pocket or key chain its light and loud, made well and not made of plastic so it wont break. I would like to see it in a red or orange color or other colors. Great item