Thermacell Mosquito Repellent Refill

• Refill includes 12 mats and 4 butane cartridges for 48 hours of repellency• To continue to repel mosquitoes repellent mats should be replaced after 4 hours of use. Butane cartridges last up to 12 hours each• Mats and butane cartridges can be used for short periods of time; turn unit off and restart when ready• Mats and butane cartridges can be stored for long periods of time. If time between uses will be more than one week, store the mat in a dry, dark place• Refills fit all Thermacell mosquito repellent appliances and lanterns