Features:1. Super loud, the double-tube whistle is very loud and easy to blow. The sound power is as high as 150 decibels, enough to be heard from a long distance.2. High quality, made of stainless steel, strong and durable. Convenient to carry: It is equipped with a key chain and a lanyard, which can be tied to a backpack, belt, or hung around the neck.3. The emergency whistle is blown wet or blown dry. Convenient to carry: It is equipped with a key chain and a lanyard, which can be tied to a backpack, belt, or hung around the neck.4. Field rescue sentry tool, lightweight, equipped with a keychain, easy to carry5. Multi-purpose: emergency survival whistle is suitable for outdoor activities such as hiking, fishing, camping, boating, hunting, etc. It is also suitable for lifeguards, pet dog training, etc.Specifications:Name: double tube survival whistleMaterial: stainless steelSize:full length 5.7cm, width 1.8cm, thickness 0.8CMWeight: 25 gramsDecibels: 150 decibelsScope of application: outdoor, survival, and other scenesColor: black, gold,silver,gray,camouflagePackage Included:1pc * whistle