Slatkin & Co. Duo Wallflowers Pluggable Home Fragrance Starter - Brown Pair with your favorite Wallflowers Fragrance Bulbs (sold separately) to fill an entire room with fragrance. A quick twist of the rotating plug lets you choose a vertical or horizontal outlet Use with Wallflowers Fragrance Bulbs only (sold separately) Use two different fragrance bulbs and combine 2 scents (sold separately)