Mosquitoes ruin everything. Thermacell's award-winning technology keeps mosquitoes away by creating a 15FT protection zone around you. For the mosquito protection on life's greatest adventures, Thermacell Refill Mats keep your Backpacker Mosquito Repeller fueled for the long haul, no batteries or cords needed. The Backpacker Repeller (not included) is powered by a camping fuel canister (not included). Emits scent-free repellent that drives away mosquitoes. Always be prepared by keeping an extra mat in your tent, backpack, garage, or tackle box, ready when you need it. PackcComes with 48 hours of mosquito repellent mats.