Compact Emergency Whistle with SOS Signal

I took jzisa's V29 as a reference for the inner chamber. I designed a new shell from scratch aiming for a compact, elegant result. I also added a hole perpendicular to the print layers for increased strength. It accepts a keyring or a cord.

The grip is excellent and it comes with the SOS signal on the bottom side of the whistle.

Bonus: You can use the top side to emboss your own name or logo.

Dimensions:

• 5 x 2.6 x 1.1 cm
   

Printing:

• 2 Walls are sufficient, use 3 for added strength.
• It can be printed without supports. 
• Optoinal: you can add supports only to the bridging on around the back hole. 

*You can test your printer capabilities with my QuBenchy - 3D Printing Torture Test Cube:

Power:

• This design uses a similar chamber as jzisa's V29, which claims 118.7 dB. Be mindful when using the whistle.

Feedback is welcome. Cheers!

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Rendered in Blender, using Blender Boom's Desk Scene and @Az3Dip's Ender 3.