Portable Mosquito Repeller is easy to use and provides hours of scent-free, mess-free mosquito defense up to 15' per repeller. With no batteries or cords needed, the portable repeller is ideal for hunters from the tree stand to the duck blind, as well as on-the-go adventures like fishing, camping, hiking and more. Includes one repeller, one 12-hour fuel cartridge, and three 4-hour repellent mats.