This is a Flat Aluminum Alloy Dual-Frequency Survival Whistle, designed for use in emergency situations. It features a durable yet lightweight aluminum alloy construction, which provides resistance to corrosion. The Whistle is equipped with dual-frequency high-pitched sound options, making it effective for signaling in various environments. It is a vital tool for outdoor adventures, wilderness survival, and emergency scenarios. Made from pvc material, measuring 0.59*2.2 inches, this custom flat aluminum alloy dual-frequency survival whistle. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. Customization available: Print your logo or customize packaging and color schemes. Product Highlights: Portable, durable, practical for daily use.