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SOS Anodized aluminum micro whistle keychain by Wazoo

SOS Micro Whistle™

16 reviews Regular price $5.00
461 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
4.9 Based on 16 Reviews
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Filter Reviews:
Jason G.
United States
Just a breath will leave your ears ringing!

Awesome tiny lil thing! Can't believe how much sound comes out of it with so little effort.

Paul B.
United States United States
Sos whistle

Very loud better than a horn

Ireland Ireland
Genius idea. Add to leather braclet for kids !

Best, smallest Whistle Ive found. Gonna get these for the kids backpacks too.

Kim W.
United States United States
Awesome whistle

Love how small and light weight it is, yet super sturdy! Perfect to throw in my cache belt to have on me.

Brandon B.
United States United States
Really loud EDC whistle

Really loud whistle and it stores great in the cashe belt

brian m.
United States United States
it's really loud

Haven't really gotten outside with this yet. But it's really loud and appears to be indestructible. Of course, I will have to test it more. For now, though....

Richard S.
United States United States
Easy carry

Great addition to my cap and belt

Nathan H.
United States United States

Great piece of kit! Small, light, and very loud!