Rocky Mountain Yote Howler System pairs a tube amplifier with a diaphragm mouth call for the ultimate in coyote calling! Lure them in close with the Yote Howler System. The tried and true Yote Howler Palate Plate mouth call diaphragm combines with the tube amplifier for far-reaching sound, guaranteed to get the attention of the local coyotes This predator call system gives you the volume and consistency you want, and brings those crafty coyotes in close so you can make your shot. Call in those coyotes with this Howler System!