Brand new mold, new materials, curved corner design, ultrasonic welding, high volume, well-crafted with no burrs.Individually packaged in OPP.Large quantities in stock, self-produced. Survival whistle, this whistle has three holes, each hole produces a different sound.Taken together, the sound is pleasant and melodious. It is a good product at a low price The whistle has three holes, each of which produces a different sound.The sound is pleasant and melodious. With hanging chain Product Name: Survivalist Multi-Audio Survival Whistle When traveling outdoors, it can help you confirm your location, avoid getting lost, find companions, and provide other assistance. If you want to have an ideal outdoor trip, don't forget to make careful preparations before setting off 0k Don't forget to check whether the whistle is attached before setting off Brand new mold, new materials, curved corner design, ultrasonic welding, high volume, well-crafted with no burrs.Individually packaged in OPP.Large quantities in stock, self-produced. There are three holes, each producing a different sound.Taken together, the sound is pleasant and melodious. Product Name: Multi-Audio Survival Whistle Material: High-quality plastic Length: 70 mm Width: 27 mm Thickness: 7 mm