Wildlife Research Magnum Scrape-Dripper Combo with Golden Scrape Scent - Drips daytime only, to get bucks to come during daytime hours. Can operate up to 2 – 3 weeks on 4 FL OZ of scent depending on temperature swings. Gradually intensifies scent output to get bucks even more riled up! Normally shuts down during rain & bad weather, so it saves your valuable scent. No batteries required!