Description When you are in an emergency in the wild, blow this whistle for help. Adopting great aluminum alloy material, which let you use for a very long time. The compass can help you identify the direction quickly and more easily find the way. Features -Color:black -Material:Aluminum alloy -Size:9.00X1.40X1.40cm/3.54X0.55X0.55in -Note:4 LR41button batteries are not included. -Made of aluminum alloy material, this whistle is sturdy and durable. Not easy to deform and rust. -The whistle ensures loud crisp and higher tones, good volume, blow vigorously. -With compass, flashlight, keychain design, convenient for outdoor survival use. -It is lightweight for easy and convenient to carry and store. Convenient and practical. -Apply to outdoor survival, self-protection, life-saving and collect, providing help for you.Package list: 1 x whistle