PIC 4322 Mosquito Repellent, 4 Coils (Pack of 3), 1 PIC C-4-12 Mosquito Repellent Coil, 4-Per Pack, Totaling 12 2 Buy one Get One Free (Totaling 3 pack) Burns for 5-7-hour OutDoord Used on patios and porches Effective and easy to use