Come and Check Our Branding Solutions.The Double tube metal whistle is extremely loud and easy to blow. This emergency whistle can provide up to 120 decibels, can be heard for far distance, also suitable for referee and coaches. The aluminum alloy material is very strong. This whistle can be used in all-environment all-weather, rainy day, humid weather with excellent airflow design. This survival Lifeguard Whistle can used as pet whistle, bear whistle, dog whistle, ref whistles, toy whistle, camp whistle and gym whistle. Suitable for outdoor activities and sports. 100% guarantee for quality. The price includes the shipping cost to CA, QTY over 10K by ocean. Pls check inventory and detailed info before placing your orders.