Description: Introducing the SonicBoom Whistle: For when 'quiet' is not your middle name! ? This whistle is perfect for waking up the whole neighborhood or summoning your pet pterodactyl. Earplugs not included!" ? This is a pack of 2 of the loudest whistles we have ever heard which is the main reasons our store selected this particular model to sell of all the different models we tested. There are a number of features that sets this model apart from anything else you will find... The whistle actually has two slightly different tones produced at the same time by separate chambers on either side. The two different tones alternate between amplifying and canceling each other out. This variation creates the shrill sound that is more attention grabbing and does not get lost as easily over background noise to get you noticed in all conditions unlike a single tone whistle. The whistle has been tested at over 118db and will increase its volume the harder you blow. There are no moving parts to jam so someone with a stronger lung capacity may reach louder levels without the risk of something jamming. The whistle is designed to be indestructible, have no moving parts and float without needing to be attached to a keyring floatation device. It is an easy to carry and grip quickly with thick gloves or cold hands. It has a clean, simple and modern design with a raised lip on the bottom and groves which allow for a more secure grip in your mouth. It can be used wet or dry. The back has a hole for a key ring or lanyard so you can wear it around your neck or attach it to a zipper, keychain, life vest, or whatever. Key ring and lanyard not included. Designed by Joe Zisa in Philadelphia Features: 1?? 118db. 2?? Indestructible, no moving parts and floats. 3?? Two alternating tones create an attention grabbing sound. 4?? Personalize this by choosing from any color to match your aesthetic preferences. 5?? 3d printed to order from a plant based and environmentally friendly PLA plastic using 100% renewable energy in Beaverton, Oregon. Dimensions: Height: 0.9 inches Length: 2.5 inches Width: 1 inches More Information: ? This is made to order using 100% renewable energy in our home here in Beaverton, Oregon. ?? This is 3d printed from a plant based, durable, biodegradable and environmentally safe type of plastic. ? Check out our other carefully selected products and get a discount on multiple items. ?? Where possible we try to ship using sustainable and recycled packing material. ? Most orders are made on demand immediately after you place the order and shipped the same day or within 24 hours. ?? Please contact me for anything.