An air horn is a must-have for any emergency kit or outdoor adventure. These portable, handheld devices emit an extremely loud blast of compressed air that can be heard from up to a mile away. Whether you need to signal for help on the road, scare off wildlife during a camping trip, or simply make some noise at a sporting event, an air horn is the perfect tool. Most models are powered by disposable or rechargeable canisters, allowing you to unleash piercing blasts of sound at the push of a button. With their rugged construction and compact size (typically around 6-8 inches or 15-20 cm long), air horns are designed for easy storage and portability. Keep one in your car, boat, or backpack for added safety and peace of mind. Just remember to use them responsibly and avoid startling others unnecessarily.