Air Wick Scented Oils plug in air freshener refills are designed to add a consistent and long-lasting fresh fragrance to any bedroom, bathroom, hallways, kitchens, living rooms, dens or office spaces. This captures the freshness and warmth of sweet and spicy notes that welcome guests like a warm blanket on a crisp autumn day. This scented oil plug in air freshener refill is simple to use: just plug in the scented oil warmer into your wall outlet and insert this refill. When the oil runs out, you can choose to replace it with the same fragrance or a different one.