• 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