Billed as “the world’s loudest whistle,” the Original HyperWhistle is designed and built to make your presence known in any situation. With a tested output of up to 143dB and a sound that can travel 2 miles in perfect conditions, this thing is 8 times more powerful than your average sports whistle. It’s still a whistle, so ease of use isn’t really an issue, but it does come with an easy clip lanyard to make travel and use more convenient. It’s also naturally buoyant and works underwater, which makes it perfect for boating. Additional uses of the HyperWhistle include sporting events, personal security, camping, hiking, and anything else you need a really, really loud whistle for. At the end of the day, if you’re going to use a whistle it should be one that’s incredibly loud—so loud, in fact, that the HyperWhistle comes with hearing protectors.