Top note is the initial impression of the fragrance, middle note is the main body of the scent and base is its final impression.
About Electric Plug-in Refills A convenient way to make sure you always have a reserve on hand so you never run out. Plus, they make it easy to enjoy your favourite authentic, true-to-life Yankee scent in multiple locations. Replace after 4 to 6 weeks. Contains two bottles of scented oil which are designed to fit both Yankee Candle Electric home fragrance units.