This Wildlife Research Center® Magnum Scrape-Dripper Combo™ has what you need to draw in bucks to scrape hunt. The scent dripper releases buck lure for 2 - 3 weeks on one 4 fl. oz. bottle (included) to attract bucks to your hunting area during the daytime. The dripper normally shuts down at night and during bad or rainy weather to save your lure. No batteries required.