Emergency Survival Whistle Metal Double Tubes Safety Whistles With Lanyard And Keychain For Hiking Hunting Boating Outdoor Camping Sports Dog Training High quality: The whistle is made of high quality aluminum alloy, which is durable, not easy to fade, and has a long service life. Moreover, its surface is smooth and not easy to stick dust, which is more practical than other materials. Waterproof and rust proof. High decibel: This emergency whistle can provide up to 120 decibels of sound, which can be heard from a long distance. The double metal whistle is very loud and easy to blow. A powerful treble generator with dual tone cavity can be used as a signal whistle. Distress signal: the whistle has two different colors of gold and silver for you to use. The double tube emergency whistle can provide a sound up to 120 decibels, which can be heard from a long distance and can attract attention in any emergency. If you lose contact with a friend on the mountain and there is no signal on the phone, you can whistle. The whistle can help you find friends. High quality and lightweight: The emergency whistle key chain design is very suitable for use with house keys or car keys. It is made of aluminum alloy. It is sturdy and durable, only 12g. It is equipped with a key chain and a lanyard. It can be tied to a backpack, a belt, or hung on the neck as a whistle necklace. Wide range of uses: this survival whistle is very loud and suitable for outdoor activities,