You can be safe in the water and the Aquablast Personal Watercraft Horn addresses that loud and clear. Simply attach to your personal flotation device and you've got all the protection you need with the push of a button. 100% ozone safe, rust resistant,and non-flammable. Delivers a piercing blast that signals for help even after being submerged in water. Attaches to your personal flotation device in seconds. Built to keep on working. Almost impossible to lose in the water- It Floats! Refills readily available.