Keep your boat equipped with all the safety equipment you hope to never need with an Attwood Air Horn. This 2-pack of 8 oz. air horns will allow you to make sustained blasts to alert other boaters of your navigational intentions or inform any one in the area of your need for assistance. Attwood Air Horns send a clear signal of distress over water or land. They are USCG approved for boats up to 39' and 100% ozone safe. Make them a standard of any emergency kit to send out an unmistakable ear-piercing alert for help. You can also use Attwood Air Horns as a signal for the start and stop of sporting events or to call together a group at family celebrations and reunions.