Glow Plug-in Refillable Air Freshener - Summer Breeze (6-Pack) Innovative plug in car air freshener will certainly grab your attention Glow Plug car air freshener is available in two vibrant colors Air freshener plugs into your car's DC socket/cigarette lighter Life of the Glow Plug Air Freshener increases when kept in an enclosed area where air flow is more restricted (i.e. a car with its windows rolled up) Also Available in 6 Packs