Material: Plastic Size: 7*2.5cm / 2.76"*0.99" Color: As shown 1. Multifunctional design, suitable for a variety of scenarios, including outdoor survival, sports competitions, and pet training. One whistle for multiple uses, meeting diverse needs. 2. High-decibel material with strong sound penetration, ensuring clear signal transmission even in noisy environments or at long distances, ensuring safety. 3. Multi-tone frequency conversion technology produces different sound frequencies, making it suitable for specific scenarios such as search and rescue signals or animal behavior guidance. 4. Compact and lightweight, easy to carry, it can be attached to a keychain or backpack for immediate access at critical moments, making it an essential emergency tool for outdoor activities. 5. Waterproof and long lasting construction, with drop-resistant and wear-resistant materials, withstands harsh weather conditions and maintains its shape and color over time. Package includes:1pcs whistle