This whistle is designed specifically for outdoor activities. Made of durable aluminum alloy, it measures only 3.6 inches x 0.6 inches, weighs 0.06 lbs, making it lightweight and easy to carry, and can reliably function in various weather conditions. It emits a loud and clear sound, making it ideal for emergencies. Additionally, it integrates multiple functions including a compass, flashlight, and keychain, transforming it into a versatile survival tool. Suitable for a variety of adventures and outdoor activities, it is the perfect choice for adventure enthusiasts. Available in multiple colors, logos or information from schools, sports teams, organizations, or companies can be added through laser customization.