The ThermaCell Mosquito Repellent is great for hunting, fishing and camping it is powered by a butane cartridge that heat a chemically treated repellent mat. ThermaCell has 50 times more effective ingredients than coils and citronella candles. Covers an area of 225 feet. Cordless and portable, ThermaCell creates the "Cell of Protection" anywhere. Included: 1-reversible appliance, 1-Butane cartridge (lasts up to 12 hours), and 3-Insect repellent mats (each last up to 8 hours). NOTE: ORMD Item. Cannot be shipped via any air service.