Survival Whistle with Compass and Thermometer for Outdoor Adventures

Model: 3-in-1 high-decibel survival whistle (whistle, thermometer, compass)
Product function:
1. North (South) needle (high accuracy, clear at a glance)
2. Thermometer (faster and more accurate to grasp the current temperature at the first time)
3. One side with thermometer, the other side with compass:
4. Nylon hanging rope (more convenient to carry with you, the rope is about 40cm long (can be hung around the neck)
5. The whistle is loud
Product weight: about 20g
Product length: about 63mm
Product width: about 30mm