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. Refillable using Ace#7100902, 7261233, 7526866 and 7526759.