Mosquitos are no small problem - they can ruin a good time with painful bites, bothersome buzzing, and days of itching afterwards. Until now, sprays, lotions, torches, DEET and citronella have been the only options for fighting mosquitoes. We started Thermacell because we wanted a better way to fight mosquitoes. From humble beginnings, our team of entomologists, researchers, and outdoor enthusiasts has over 100 years of combined experience fighting mosquitoes. Enter Thermacell. For thebackyard and beyond, Thermacell Patio ShieldandThermacell Patio Shield Lanternareeasy to use and provides hours of scent-free, mess-freeandDEET-free defense against mosquitoes.No cords or batteries. Powered by a safe compact fuel cartridge that lasts 12 hours, repel without smoke, flames, or citronella. Not a messy trap or gimmicky sonic.