The Haydel Variable Tone Deer Grunt Call is highly effective when used in conjunction with rattling. Covering the hole on the barrel with your index finger emits a low pitch, while leaving it open creates a high pitch, to create grunts of more than one deer.
Specifications:

Type	Deer Call
Species	Whitetail
Material	Acrylic/Collapsible Hose
Sound Species
Electronic	No
Battery	None
Color
Style
Proofs
Calls
Difficulty Level
Preset Features
Hands Free
Compatible With
Sounds