I tie it around my ankle, fill it with lure trail. I like to lay trails a hundred to hundred fifty yards. Remove drag and hang 20-30 yards out before you get to your stand. This actually enables you to hunt a lot more territory than just sitting in one spot. All adjustments in tone are made by lenghtening or shortening the expandable tube.
Sounds range from low, mellow grunts to loud heavy grunts.
Made with five specially cut pieces of wood that gives the sound and volume you need. Camouflage material with belt loop and tie string to keep it quiet while moving.