Giới thiệu Còi Thổi Khẩn Cấp Chuyên Dụng Khi Đi Cắm Trại Louisheart
feature: 1. The whistle is clear and loud. 2. Long transmission distance, suitable for calling for help, recruiting teammates and outdoor activities. 3. Can be hung on tents, gear, water bottles, backpacks, keychains and other accessories. 4. Wear-resistant, practical and convenient. 5. High-frequency double-barreled survival whistle.