The Coghlans Four Function Camping Whistle is an excellent little gadget. Aside from the whistle you get a s-scale compass o find your way around. The metal spring-loaded clip will let you keep it handy and the lanyard will make sure you don't lose it. Use the whistle to let your fellow campers know dinner is ready dinner, to call over your four legged friend or to communicate with others over long distances via agreed signals. In an emergency you can use it to call help over your way.