Keep the mosquitoes away with the Thermacell Patio Shield Mosquito Repeller in Royal Blue. Stylish and compact, our Patio Shield Repellent blends in beautifully with outdoor decor while effectively repelling mosquitoes. This fully portable mosquito repeller makes mosquito protection easy — Set it on your porch, in your yard, or take it with you camping or to an outdoor concert. While other mosquito repellents include chemicals placed directly on your skin, Thermacell Patio Shield surrounds you with a 15-foot zone of scent-free mosquito protection without spray or DEET. Like all Thermacell fuel and mat repellers, the Patio Shield uses a 12-hour fuel cartridge and blue heat-activated repellent mats. Butane provides the cordless, portable heat that activates the devices; the heat generated by the butane fuel cartridge is directed to the mat, activating the repellent and creating a zone of protection from pesky mosquitoes. Plus, it's reusable and compatible with our Thermacell refill cartridges and mats. Turn it on.. Mosquitoes GONE!