The Portable Mosquito Repeller is virtually scent free and provides 15' by 15' Zone of Protection. Repels mosquitoes, black flies, and other flying insects. The heated mat releases repellent into the air. With no open flames, this product is extremely convenient and silent. Package includes 1 Butane Cartridge, that's good for 12 hours before refill, and 3 Repellent Mats, each mat lasts a maximum of 4 hours. A great product not for just hunting, but can be used for campfires and all kinds of outdoor events and gatherings. This product is available in black, grey and olive green. The camo option comes with a camouflaged pouch.