Take advantage of effective mosquito protection without using sprays or lotions. Quiet, battery-powered fan circulates scent-free repellent all around you for protection within minutes. Clip it onto your clothing, or set it down on a flat surface. Refills are sold separately and contain two disks for 12-hour protection per disk. Powered by two AAA alkaline batteries (included). Comes with one refill. Available: Clip-on Unit, 2-pack refill.