Thermacell Repellents INC MRPSL: The Thermacell Patio Shield Mosquito Repeller effectively repels mosquitoes by creating a 15-foot zone of protection. This compact, easy-to-use and stylish device will look great on any patio or deck while it works to keep pesky mosquitoes from biting and bothering your guests. This model comes in a black graphite. It includes 3 refill mats and 1 fuel cartridge.