Micro Whistle

An ultra-compact whistle designed to fit on your keychain without adding noticeable weight or bulk.   Despite weighing less than 1 gram, it produces a surprisingly loud sound, making it useful as a simple signaling or attention-grabbing tool for everyday carry, hiking, camping, or outdoor activities.   The model prints in about 3 minutes (excluding printer calibration), making it perfect for using up the last bit of filament or printing several at once.