whistle (challenge your lung's explosive power)

If possible, show your loudest sound and your powerful lung capacity in the comment section to see if it's possible to break 130dB.

8g filament no supports printing

This multi-chamber survival whistle is a Print in Place 3D Printed model, requiring no supports, featuring a tactical mech-style 3D textured design; The main body is divided into three sound chambers, complemented by multiple hollow sound guide holes on the sides, and a top integrated hanging ring for easy lanyard carrying. Available in multiple colors: military brown, bright yellow, pure red, and matte white in four color schemes. Printed with PLA filament, the texture is delicate, and the layer lines are clearly visible. The acoustic structure has been optimized, with a measured volume reaching 129dB (A) high decibels, offering extremely strong penetration, suitable for outdoor rescue, tactical self-defense, camping survival, and water search and rescue scenarios. The overall design is rugged, with a herringbone anti-slip embossed surface, symmetrical circular holes on the sides for noise reduction and diversion, and a three-opening resonance chamber at the bottom to amplify sound waves. Its compact and portable size makes it a dedicated high-decibel whistle model for emergency calls.