ECOBLAST SPORT RECHARGEABLE SIGNAL AIR HORN ozone Safe -Ideal for sporting events, boat safety, any event to signal a grouping. -Can be recharged using air from a bicycle or sport hand pump, service station air pump, or an air compressor ( not included ) -Can be heard from 1 mile away -For use in all types of weather -Can be stored indoors or outdoors -100% ozone safe -Powerful 120 DB of sound