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. Product Features Thermacell Mosquito Repellent creates a 15-foot zone of protection against mosquitoes. This 48-hour mat-only refill pack is for use in the Thermacell Backpacker Mosquito Repeller only. Unscented repellent mats last up to 4 hours each and change color when the time to replace. No mess and easy to refill. No cords or batteries. The Backpacker Repeller (not included) is powered by a camping fuel canister (not included). Emits scent-free repellent that drives away mosquitoes. Repel mosquitoes without DEET sprays or lotions on your skin. No smoke, flames, or strong scents like citronella. Enjoy maximum protection in 15 minutes. The synthetic allethrin formula is inspired by repellent extracts found in plants. Independently tested and EPA-reviewed for safety & effectiveness. People and pet friendly. Backed by the Thermacell Satisfaction Guarantee. See packaging for details. *For Outdoor Use Only Includes: 12 repellent mats lasting 4 hours each Product Specifications Active Ingredient 21.97% D Cis Allethrin Hours of Protection Included 48 hours Refill / Cartridge Type Fuel and Mat Weight (12) Mats 1.0 ounce