if the season is out where you are, i would set it up to go off about 1-2 hours before dark for 20sec each time. if it holds 2 bags it should last about a week mabey. after you fill it back up the deer will be use to it then i would cut back to 10sec to make it last longer. youll notice that when you run out the deer will tear the gound up trying to get more. just give em enough to keep em coming back. also. if the battary goes deaddont be lazy like i did and let it set up there all summer w/o getting the corn out. im not gonna even begin to explain how nasty it was and what all was in there