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. From humble beginnings, our team of entomologists, researchers, and outdoor enthusiasts has over 100 years of combined experience fighting mosquitoes. Enter Thermacell. For the backyard and beyond, Thermacell Radius is easy to use and provides hours of scent-free, mess-free, DEET-free mosquito defense.