Material: Plastic Size: 6*2.8cm / 2.34"*1.09" Color: Three colors 1. This multifunctional survival whistle is an ideal choice for outdoor camping. It combines survival signals with practical functions to help you get rescue quickly in an emergency. 2. The compact and portable design allows you to easily put it in your pocket or hang it on a keychain. The lanyard design ensures that it will not be lost, ensuring your safety anytime and anywhere. 3. The built-in accurate thermometer allows you to know the surrounding temperature at any time, providing a scientific reference for outdoor activities and adding more convenience. 4. Made of high-quality materials, the sound is clear and loud, and the signal is effectively transmitted. It can stand out even in complex environments and improve safety. 5. Whether it is hiking, camping or emergency preparation, this multifunctional whistle is a must-have tool for you to carry with you, combining practicality and reliability. Package includes:1pc Multifunctional survival whistle