The Thermacell MR 300G Portable Mosquito Repellent is easy to use and provides hours of scent-free, mess-free mosquito defense up to 15 feet 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.FeaturesQuiet ignition, Reengineered grill and switch, Improved ergonomics, and Accessory mounting systemIdeal for repelling mosquitoes from the backyard to the great outdoorsPortable and lightweightNo spray and no messScent-free and DEET-free.No open flame, no smoky candlesIncludes: One repeller, one 12-hour fuel cartridge, and three 4-hour repellent mats.