For all your outdoor adventures, Thermacell Portable Mosquito Repeller is easy to use and provides hours of scent-free, mess-free mosquito defense up to 15 feet per repeller. With no batteries or cords needed, the portable repeller is ideal for hunters from the tree stand to the duck blind, as well as on-the-go adventures like fishing, camping, hiking and more. Mosquitoes are no small problem - they can ruin a good time with painful bites, bothersome buzzing, and days of itching afterward. 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.