The great outdoors is calling! Keep mosquitoes away with Thermacell's Portable Mosquito Repeller. Fully portable and cordless, our repeller makes mosquito protection easy when in the woods, at an outdoor concert, or simply enjoying time on the patio. While other repellents include chemicals that are put directly on your skin, Thermacell creates a 15ft by 15ft zone of protection. Our Repeller is also reusable and compatible with our refill packs. Thermacell repellent devices are powered by a fuel cartridge which provides the cordless, portable heat that activates the devices. The heat generated by the fuel cartridge is directed to a metal grill. A small mat saturated with repellent is inserted on top of the metal grill. Heat disperses the repellent from the mat into the air, creating the zone of protection. Turn it on Mosquitoes GONE!