The BT Prey Blaster combines Knight & Hale"s exclusive "Blasting Chamber" with the deadly duo of Mylar and metal reeds means big trouble for coyotes, foxes, bobcats and other large predators. The "Blasting Chamber"s" unique design channels the airflow to the exclusive dual reed system for unequaled volume and realism. Any predator within hearing will have to investigate the authentic and anguished screams and squeals that are easily made on the BT Prey Blaster. Blasting Chamber Technology Mylar and Metal reed design Extra Loud Easy to Blow Makes perfect distress cries of prey animals