This smart dispenser keeps a scrape fresh and working to lure in the big one! Hang on a tree limb near your favorite spot. Drips daytime only, to get the bucks to come in while you're in the woods, and gradually intensifies scent to get them really riled up! Can operate up to 2-3 weeks on 4 oz. of scent, depending on temperature fluctuations. Normally shuts down during rain & bad weather to save your valuable scent. No batteries required.