Say goodbye to messy and sticky sprays that can spoil your gear and turn off the fish. With Thermacell, you’ll get fewer bites (from mosquitoes) so you can get more of the bites you want! This system fights mosquitoes without spray. Since Thermacell does not contain DEET, it won’t ever damage lines or gear, or spook fish. Even a small amount of DEET on your lure or bait can turn fish off. Thermacell creates a 15-foot zone of protection that repels mosquitoes. Portable and lightweight, the mosquito repelling system requires no cords or batteries so you can use it anywhere adventure calls. The MR300 Portable Repeller has an ergonomic design which is comfortable, functional, and easy to use. Simply insert a repellent mat and a fuel cartridge, then turn it on. The fuel creates heat. A view window lets you check for an orange glow to ensure the heat is on. Heat activates the repellent in the mat. After 15 minutes, a mosquito protection zone is formed. The repellent mat turns white after about 4 hours indicating it’s time for the mat to be replaced.