Come and see our amazing products. This safety whistle has a unique double tube design that produces 120 decibels easier to attract the attention of persons outdoors. It has a unique double tube. The dual chambers without built-in peas and high frequency make sure that the product won't mold and breed bacteria due to the pea. The whistle is durable, waterproof, and rust resistant which won't break or freeze under harsh conditions, and is safe for gripping directly from the mouth as it is made of aluminum alloy. Pls confirm with us about the packing info, stock color and exact production time before placing your order.