SUPER LOUD--- There is a enlarged natural wood pea in the whistle. The big pea hits the thick ABS wall that makes the sound louder and more penetrating. Sound power of 120 Decibels.^ PRIME WHISTLE--- Made of thickened ABS resin, ultrasonic bonding (Most whistles are glued on the market which are not environmentally), environmentally friendly, non-toxic, odorless, resistant to fall and corrosion. Can be used for many years.^ FREE HANDS--- Each whistle comes with a strong and comfortable braided lanyard. You can wear it around your neck or hang it on your backpack to free your hands.^ VALUED PACKING--- 12pcs whistles with lanyards. These whistles are eye-catching, perfect for lifeguard, self-defense and emergency. You can use as referee whistle, coach whistle, school whistle, police whistles and etc as you like.^ SATISFACTION GUARANTEED--- Please feel free to contact us for anything, we will response .