Portable Mosquito Repeller is easy to use and provides hours of scent-free, mess-free mosquito defense up to 20 m² 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.