Thermacell Rechargeable Mosquito Repeller Refill - 36 hours - Stay protected for up to 20 feet with Thermacell's most advanced repellent refill ever. Thermacell Rechargeable Repellent Refills are compatible with all Thermacell rechargeable repellers, including the E-Series and Radius Zone Mosquito Repellers. Scent Free, No Mess, and Highly Effective. Features 36-hour refill only for Thermacell Rechargeable Repellers use. Dependable Mosquito Repellent Refills – Fully sealed, travel-friendly Rechargeable Mosquito Repellent Refills are compatible with rechargeable Thermacell devices only (E-Series and Radius). No Spray, No Mess, Scent-Free. Thermacell Rechargeable Mosquito Repellers deliver powerful and effective defense against mosquitoes without spray, mess, or scent. No Chemicals on Skin –Rechargeable Mosquito Repellent Refills are scent-free and do not contain DEET.