The Schawbel Refill Unit Small includes 1 butane cartridge. It provides a shield from mosquitoes and other pesky insects. Each cartridge lasts up to 12 hours and each mat lasts up to 4 hours. There is long storage.

• Includes 1 butane cartridge
• Provides a shield from mosquitoes and other pesky insects
• Cartridge lasts up to 12 hours and each mat lasts up to 4 hours