The Claire Burke Fragrance Warmer Unit is a convenient and attractive electric plug in to warm your favorite refill and release concentrated fragrance into your home. The unit is easy to refill and has an adjustable back to suit any outlet style. The decorator plate conceals the refill bottle, and the neutral color blends well with walls and outlets. To use, you must purchase any of the Claire Burke fragrance warmer refills to fill the warmer unit. Single plug in unit only.