Keep your patio, backyard, or campsite clear of pesky mosquitoes with the Thermacell Mosquito-Repellent Refill for Radius and Rechargeable Repeller Units. Featuring an odor-free and DEET-free formula, this refill unit keeps your Radius or other rechargeable Thermacell repeller units effectively creating a 20' zone of protection from mosquitoes and other flying pests. Ideal for use while you are camping, hunting, fishing, gardening, and around the backyard. NOTE: This refill is not compatible with Thermacell's fuel-powered repellers. Fully sealed, travel-friendly Thermacell rechargeable repeller unit refill Provides a 20' zone of protection Odor-free and DEET-free formula Compatible with Radius and other rechargeable Thermacell devices only