This patented deer scent dripper from Wildlife Research Center(R) is the deadliest method known to keep a scrape fresh and working. The Ultimate Scrape-Dripper(R) drips your buck lure only during the day to make sure the buck works the scrape during the day. This allows the user to pattern the buck. The unit shuts off at night or during rain when temperatures are not rising. Will operate about a week on 1 FL OZ