This call is developed specially for calling Roebuck. It is pre-tuned for all the sounds you need, simply move the rubber band between the two outermost notches on the call to change sound. This call has a double sound board that can be used to control the volume. If you want a softer sound, cover the large hole on the underside of the call with your thumb. Alternate contact / agitation / agony sounds with some minute between for 20-30 minutes / stand. You find calling schedule and more tips in the DVD – Calling Roebucks