The Rocky Mountain Hunting Calls 434 Stealth Series Dirty Dog offers a predator call that makes a variety of howls. Mouthpiece features wide reed, plastic barrel, tone cap, and automatic Lip Positioner. Place fingers over the holes while blowing. This will change the pitch to a deeper sound and less volume. Remove fingers from the holes and the pitch will be higher with more volume. Produces locator, challeng, or invitation howls along with lost mate sounds. Includes teh new VETT (volume enhanced tone technology) system to create more volume, stabalize higher notes, and get raspier barks while using less air to operate.