Primos Hunting ICON The Challenger Predator Call Multi-Color Medium. With the 6in acrylic barrel this howler is super loud and the tone board giving it great sound. The open-reed is versatile enough to make distress sounds giving more realistic sounds to your hunt. All combined with the easy to use open-reed system makes this call the complete coyote howler. Specifications for Primos Hunting ICON The Challenger Predator Call: Manufacturer: Primos Hunting Color: Multi Species: Elk Call Type: Mouth Call Package Contents: Primos Hunting ICON The Challenger Predator Call Primos Hunting P404: ICON The Challenger Predator Call Multi-Color Medium