U.S. Patent No 5,910,039. Winter predator calling is made easy with the Regulator 10. The reed in this call is placed in the mouth when you call, so it's FREEZE-PROOF. Just like the government hunters, regulate the predator population with the Regulator 10. Open-reed design allows for variable pitches, adding realism to your calling. 10 mil. reed creates high-pitched distress cries of rodents, small game, young deer and elk.
; "Primos Regulator 10 Predator Call")