Aroma Accents Fragrance Plug, Christmas Bulb Tree, is the perfect addition to your home this holiday season! Simply twist off the cap on the fragrance oil refill, twist the oil into the oil diffuser, plug it in to a standard oulet upright, and it will instantly start releasing a soothing fragrant scent into the air. Customize each individual room with a unique fragrance and fragrance oil diffuser. Enjoy weeks and weeks of long-lasting fragrance.