THERMACELL MOSQUITO REPELLENT REFILL: Creates a 21m² mosquito protection zone. Ideal for outdoor use. COMPONENTS AND DURATION: The package includes 4 butane gas cartridges x 12 hours and 12 odorless plates x 4 hours. 48 hours of Protection against mosquitoes. Compatible with Thermacell Mini Halo and MR300 Portable devices. HEAT ACTIVATED MOSQUITO REPELLENT TECHNOLOGY: Emits an odorless repellent, without smoke, flames or strong odors such as citronella, creating a pleasant and hassle-free experience, safe for everyone. PACKAGE INCLUDES: 4 butane gas cartridges with a duration of 12 hours each and 12 plates lasting 4 hours each. SAFE AND EFFECTIVE: Independently tested by the EPA for safety and effectiveness. Extend your Thermacell warranty to 3 years with registration. Thanks to its effectiveness and ease of use, Thermacell has been elected Product of the Year 2024 in the Outdoor Mosquito Repellent category.