simply pull handle & push for loud blasts meets u. S. Coast guard requirements for boats up to 65 ft;recommended for coaches, boaters, officials, motorist, lifeguards, hikers, bikers, sports fans & more emits no harmful gases to environment economical & reusable, no refills needed; upc : 752080007218shipping dimensions : 8. 95in x 6. 50in x 3. 00inestimated shipping weight : 1. 0514.