Loudest sound, dual tubes can provide up to 150 decibels, can be heard over long distances. Strong and durable stainless steel material ensures the durability of the whistle Good environmental adaptability - The whistle does not have a built-in pea, so it will not mold or breed bacteria due to the pea. You can use it in any dusty or dirty water environment Convenient and practical, with Kering keychain and carabiner, can attach to your backpack, belt,< /p> Package includes, 2 whistles with key rings, 2 carabiners in assorted color, 2 lanyards
