1. Material: plastic
2. Function: whistle / thermometer / compass three in one
3. With a convenient 40cm nylon suspension rope, easy to carry
4. The material is sturdy and durable, withstand the test of harsh outdoor environments
5. High decibel design ensures your signal can be heard from far away in the wilderness
6. Suitable for camping, hiking, biking, skiing and other outdoor activities
7. Size: about 63 x 30mm
8. Weight: about 20g