• Refill provides up to 24 hours of energy for ThermaCELL or ThermaSCENT appliances.
• Refill Includes 2 cartridges.
• Cartridges don't need to be used all at one time. For example, one could use the cartridge for an hour a day. Simply turn the unit off and restart when ready.
• Cartridges can be stored for long periods of time. They are not perishable.

Make sure your ThermaCELL Mosquito Repellent keeps protecting you fromthose pesky bugs. Don't run out of refills. All ThermaCELL models use thesame refills, each cartridge lasts up to 12 hours, and each mat lasts up to 4 hours. Refills can be stored for long periods of time. Cartridges andmats don't need to be used all at one time. For example, one could use thecartridge and mat for an hour a day. Simply turn the unit off and restartwhen ready. If time between use will be more than a 1 week, store the matin a dry, dark place. The repellent, allethrin, is a synthetic analog(chemical copy) of a naturally occurring insecticide, pyrethrin, found inthe pyrethrum flower, a member of the chrysanthemum family. Also availablein value pack refills and scented refills.