Features:1. This product is small and light, with keychain, easy to carry and not easy to lose.2. Adopt dual tubes with large calibre and loud sound, up to 120dB, very easy to obtain attention in case of emergency.3. Use high-quality aluminum alloy material, durable, light and preservative, very suitable for outdoor use.4. Apply anodizing technology, the is not easy to fade, have a long lifetime.5. Metal whistle is suitable for various weather, can also be used in rainy weather, making your trip safe and sound. Specifications:Material: Aluminum AlloyPeak Volume: Approx. 120dBColor Options: Golden, SilverSize: 5.5*1.5*0.8cm/2.17*0.59*0.31inWeight: 13.00g/0.46ozPacking list:5 x Dual Tubes Outdoor Survival Whistle