The latest edition to the Thermacell line, Patio Shield Repeller Black is a compact and stylish device that will look great on any patio or deck while it works to repel pesky mosquitoes. Thermacell protects millions of people from mosquitoes with no messy sprays or lotions, no odors, no noise, no DEET, and no open flames. The package contains: 1 Patio Shield Repeller, 1 outdoor cap, and 12-hours of refills – 3 repellent mats and 1 butane cartridge.