The Patio Shield Mosquito Repeller from Thermacell works to keep the bugs away. The Patio Shield Mosquito Repeller creates a 15-foot mosquito-free zone without DEET spray, smoky candles, open flames, unpleasant smells, or expensive professional treatments. Ready to protect for 12 straight hours, the highly effective repeller comes with three repellent mats and one fuel cartridge, all of which fit together in a cordless, compact and lightweight unit that blends beautifully with your tabletop, flowers, greenery, and glassware. From Thermacell, the expert in area mosquito protection, the Magenta Patio Shield is simple and clean to use, keeps mosquitoes away without spray, and creates a powerful invisible barrier against mosquitoes.Specifications and Features:12-hours of mosquito protectionFuel cartridge lasts 12 hours each15-Foot Area of Protection Perfect for entertaining on lawn, porch, patio, pool or deck, provides 12 hours of protection.