Loud Keychain Emergency Whistle

A robust emergency whistle designed to attach to a keychain or lanyard. The 50mm body houses a 12mm spherical resonance chamber and an integrated pea, generating a sharp, warbling tone to signal for help.

Key features:

• Compact 50mm x 18mm profile for everyday carry
• Integrated print-in-place internal pea to produce a warbling sound
• 12mm spherical resonance chamber
• Rear mounting loop for quick attachment

The flat base allows for clean printing without external supports. Once printed, the internal pea may require a gentle tap or shake to fully break free and move within the chamber.