• All ThermaCELL models use the same 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 and mats don't need to be used all at one time. For example, one could use the cartridge and mat for an hour a day. Simply turn the unit off and restart when ready. If time between use will be more than a 1 week, store the mat in a dry, dark place.
• The repellent, allethrin, is a synthetic analog (chemical copy) of a naturally occurring insecticide, pyrethrin, found in the pyrethrum flower, a member of the chrysanthemum family.

Make sure your ThermaCELL Mosquito Repellent keeps protecting you from those pesky bugs. Don’t run out of refills!